Answers
Answer:
the Ans is H2O2
Explanation:
THANKS.............
Related Questions
Calculate the numerical value of Kc for
the following reaction if the equilibrium
mixture contains 0.0450 M PCI 3, 0.116
M Cl₂, and 25.8 M PCI 5.
PC 3 (g) + Cl₂ (g) ⇒ PCI5 (g)
(the 5 in PCl is a subscript)
Answers
The numerical value of Kc for the given reaction, with the equilibrium mixture containing 0.0450 M PCl3, 0.116 M Cl2, and 25.8 M PCl5, is approximately 4942.03.
To calculate the numerical value of Kc for the given reaction, we need to set up an expression for the equilibrium constant using the concentrations of the species involved.
The balanced equation for the reaction is:
PCl3 (g) + Cl2 (g) ⇌ PCl5 (g)
The equilibrium constant expression, Kc, is given by:
Kc = [PCI5] / ([PCl3] * [Cl2])
Given the equilibrium concentrations:
[PCl3] = 0.0450 M
[Cl2] = 0.116 M
[PCI5] = 25.8 M
Substituting these values into the equilibrium constant expression, we have:
Kc = (25.8 M) / ((0.0450 M) * (0.116 M))
Calculating Kc:
Kc = 25.8 M / (0.00522 M^2)
Kc = 4942.03
Therefore, the numerical value of Kc for the given reaction, with the equilibrium mixture containing 0.0450 M PCl3, 0.116 M Cl2, and 25.8 M PCl5, is approximately 4942.03.
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which elements are solid at room temperature
Answers
Answer:bromine , neon , helium , argon , lithium , beryllium
Explanation:
Elements can be divided into three state that are solid, liquid and gas depending the intermolecular forces of attraction, distance between the particles etc. Lithium, beryllium, boron, carbon, sodium, magnesium, iron, copper, etc. are solid at room temperature.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Elements can be solid liquid or gas at room temperature.
Therefore, Lithium, beryllium, boron, carbon, sodium, magnesium, iron, copper, etc. are solid at room temperature.
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If a neutral atom has 54 protons and 70 neutrons what is the atomic number and mass number
Answers
Given that,
No. of protons (Z) : 54No. of neutrons (n) : 70we are to find
The atomic number Mass number(A)we know that,
atomic number = no. of protons in an atomatomic number of the given atom = 54and
Mass no. = No. of protons + No. of neutrons Mass no. of the given atom = 54 + 70 = 124You pour some hot water into a metal cup. After a minute,
you notice that the handle of the cup has become hot.
Explain, using your knowledge of heat transfer, why the
handle of the cup heats up. How would you design the cup so
that the handle does not heat up?
Answers
Heat transfer is the movement of thermal energy from a temperature that is higher to one that is lower.
Thermoenergy: What is it?The energy that exists in a system and controls its temperature is known as thermal energy. Heat is thermal energy in motion. Thermodynamics is a comprehensive field of physics that examines how heat and work are transferred between diverse systems.
Energy of what kind is thermal energy?The energy that results from atoms and molecules moving around within a substance is known as thermal energy, often known as heat. When these particles move more quickly, heat is produced. Geothermal energy is the earth's heat energy. Energy held within motion is referred to as motion energy.
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what element has greatest atomic radius from group 3?
Answers
Answer:
i think iron
Explanation:
i not sure with my ans
A beaker weighed 53.10g. To the isolated beaker was added 5.348g of iron pellets and 56.1g of hydrochloride acid. What was the total mass of the beaker and the products after reaction?
Answers
114.5 g is the total mass of the beaker .
Total mass of beaker=53.10g+5.348g+ 56.1g
Total mass=114.5 g
Mass is used in physics to specific inertia, a fundamental function of all remember. basically, it's far a mass of rely's resistance to changing its course or pace in response to the software of a force.
The exchange that an applied force produces is smaller the extra mass a body has. The kilogram, the unit of mass within the international machine of gadgets, corresponds to 6.62607015 1034 joule seconds using Planck's consistent (SI). One joule is produced by way of multiplying one kilogram by means of one rectangular meter per 2d.
The kilogram is decided by genuine measurements of Planck's regular on account that the second one and the meter have formerly been described in phrases of other bodily constants.
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Using the balanced equation for the combustion of ethane: 2C2H6 + 7O2 → 4CO2 + 6H2O, how many moles of O2 needed to produce 12 moles of H2O?
Answers
Answer:
14 moles of oxygen needed to produce 12 moles of H2O.
Explanation:
We are given that balance eqaution
\(2C_2H_6+7O_2\rightarrow 4CO_2+6H_2O\)
We have to find number of moles of O2 needed to produce 12 moles of H2O.
From given equation
We can see that
6 moles of H2O produced by Oxygen =7 moles
1 mole of H2O produced by Oxygen=\(\frac{7}{6}\)moles
12 moles of H2O produced by Oxygen=\(\frac{7}{6}\times 12\)moles
12 moles of H2O produced by Oxygen=\(7\times 2\)moles
12 moles of H2O produced by Oxygen=14 moles
Hence, 14 moles of oxygen needed to produce 12 moles of H2O.
The amount of oxygen required for the combustion of ethane to produce 12 moles of water is 14 moles.
How are the moles produced in reaction calculated?The moles of oxygen produced in the reaction can be given from the stoichiometric law of the balanced chemical equation.
The balanced chemical equation for the combustion of ethane is:
\(\rm 2\;C_2H_6\;+\;7\;O_2\;\rightarrow\;4\;CO_2\;+\;6\;H_2O\)
The 6 moles of water are produced from 7 moles of oxygen. The moles of oxygen required to produce 12 moles of water are:
\(\rm 6\;mol\;H_2O=7\;mol\;Oxygen\\12\;mol\;H_2O=\dfrac{7}{6}\;\times\;12\;mol\;O_2\\ 12\;mol\;H_2O=14\;mol\;O_2\)
The moles of oxygen required to produce 12 moles of water are 14 moles.
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Which type of formula shows an element symbol for each atom and a line for each bond between atoms?
structural
molecular
empirical
ionic
Answers
Answer: structural
Explanation:
When metals and non metals combine in fixed proportion then a chemical compound is formed. Structural formula shows an element symbol for each atom and a line for each bond between atoms. The correct option is option A.
What is chemical formula?Chemical formula is a formula where cation and anion combine to form a molecule in fixed proportion. Metals combine in form of cation and non metals combine in form of anion.
Cation is the species that give electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral.
Out of given structural is a 3D representation of any chemical formula, in which symbol of each element is shown .Along with symbol line for each bond between atoms is also shown.
Therefore, the correct option is option A.
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Hypothesis is a educated quess
True
False
Answers
Answer:
True
Explanation:
A hypothesis is an educated guess about the outcome of an experiment or thought
Define biotechnology. } List two advantages in the use of biotechnology
Answers
Advantages of biotechnology:
Improvement of plants and animal breeds to give a high yield of their products.
Pests and pathogen control in agriculture which will reduce the loss of yield in food crops.
Synthesis of biocatalyst which can be used for enhancing the reactions which can be carried out in vitro or laboratory conditions.
Sewage treatment or water recycling can be done with the help of transgenic microbes which have better efficiency and speed.
Biotechnology is the use of living organisms or other biological systems in the manufacture of drugs or other products or for environmental management, as in waste recycling: includes the use of bioreactors in manufacturing, microorganisms to degrade oil slicks or organic waste, genetically engineered bacteria to produce human hormones, and monoclonal antibodies to identify antigens.
Biotech offers the possibility of improving human health, the environment, and agriculture while creating more sustainable modes of production.
Select all answer choices that would result in units of moles.
a) RT/PV
b) PV/RT
c) mass ÷ molar mass
d) molar mass ÷ mass
e) molar mass × mass
f) molarity ÷ volume
g) volume ÷ molarity
h) molarity × volume
Answers
The correct options that will result in mole are option B, C, and H
How do i know which options will result in mole?To know the options that will result in mole, do the following:
Ideal gas law states as follow:
PV = nRT
Where
P is the pressure V is the volumen is the number of moleR is the gas constantT is the temperaturePV = nRT
Make n the subject by dividing both sides by RT
n = PV / RT (option B)
Mole, mass and molar mass are related according to the following formula:
Mole = mass / molar mass (option C)
Molarity is defined as mole per unit volume as shown below:
Molarity = mole / volume
Make mole the subject by cross multiplying.
Mole = Molarity × volume (option H)
Thus, from the above illustrations, we can conclude that the correct options which will result in mole are option B, C, and H
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• How does the name of the salt tell us that:
a) there is just one other element combined with the metal?
b) there is oxygen present in the salt?
Answers
The name of the salt tells us that:
a) there is just one other element combined with the metal by looking at the suffix of the salt's name.
b) the presence of oxygen in a salt can be indicated by the name of the salt.
a) The name of a salt can tell us that there is just one other element combined with the metal by looking at the suffix of the salt's name. If the salt name ends in "-ide," it indicates that the salt is composed of a metal and a single non-metal element.
For example, sodium chloride (NaCl) and potassium bromide (KBr) are salts where the metal (sodium and potassium) is combined with a single non-metal element (chlorine and bromine, respectively). The "-ide" suffix suggests the presence of only one other element in the salt.
b) The presence of oxygen in a salt can be indicated by the name of the salt. If the salt name includes the element oxygen, it suggests that oxygen is present in the salt compound.
For example, sodium carbonate (Na₂CO₃) and calcium sulfate (CaSO₄) contain the element oxygen in their chemical formulas. The presence of oxygen in the salt is implied by the name and the combination of elements in the compound.
Therefore, the name of salt tells us that there is just one other element combined with the metal and there is oxygen present in the salt
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Classify each solvent as protic or aprotic. a. (CH3)2CHOH c. CH2Cl2 e. N(CH3)3 b. CH3NO2 d. NH3 f. HCONH2
Answers
Answer:
The protic solvents are (CH3)2CHOH, NH3, and HCONH2
The aprotic solvent are CH3NO2, CH2Cl2, and N(CH3)3
Explanation:
A protic solvent is a solvent that has a hydrogen atom bound to an oxygen (O), a nitrogen (N), or fluoride (F). Generally, any solvent that contains a labile H⁺ is called a protic solvent.
a. (CH3)2CHOH
(CH3)2CHOH is a protic solvent because one of the hydrogens is bound to oxygen (O)
b. CH3NO2
CH3NO2 is an aprotic (i.e not a protic solvent) solvent because all the hydrogens are bound to carbon.
c. CH2Cl2
CH2Cl2 is an aprotic solvent because all the hydrogens are bound to carbon.
d. NH3 is a protic solvent because all the hydrogens are bound to Nitrogen (N)
e. N(CH3)3 is an aprotic solvent because all the hydrogens are bound to carbon
f. HCONH2 is a protic solvent because two of the hydrogens are bound to Nitrogen (N)
of all the hydrogen nuclei in the ocean, 0.0156 how much deuterium could be obtained from 1.0 gal of ordinary tap water
Answers
Answer:
Poop Butt.
Explanation: Poop Butt.
electrons are transferred from atoms of phosphorus to atoms of sodium
Answers
Electrons are transferred from atoms of sodium to atoms of phosphorous The sodium atom looses electron and the phosphorus atoms gains electrons.
What is an electron ?The electron is a subatomic particle with an elementary electric charge of -1. Electrons are the first generation of the lepton particle family and are widely regarded as elementary particles due to the lack of known components or substructure.
This transfer causes the sodium atoms to acquire positive charge and phosphorous to acquire negative charge .
Thus, the sodium and phosphorus atoms strongly attract with each other.
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Your question is incomplete, most probably, your question was
Complete the paragraph about the formation of sodium phosphide.
Electrons are transferred from atoms of
and the phosphorus atoms
to atoms of
C. This transfer makes the sodium atoms
As a result, the sodium and phosphorus atoms strongly
each other.
write the structural formula for 2-bromo-3-chloro-4,4-dimethylpentanal
Answers
Answer:
Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO
Explanation:
The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.
The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.
The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.
The methyl groups are non-polar and do not have any significant reactivity.
The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.
The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.
When 22.0 g NaCl and 21.0 g H, SO4 are mixed and react according to the equation below.
2 NaCl + H2SO4 → Na2SO4 + 2 HCI
how much Na2SO4 was actually made?
O 26.5 g Na2SO4
O 30.4 g Na2SO4
O 53.5 g Na2SO4
O 14.4 g Na2SO4
Answers
Taking into account the reaction stoichiometry and limiting reagent, 26.72 grams of Na₂SO₄ are formed when 22 grams of NaOH reacts with 21 grams of H₂SO₄.
Reaction stoichiometryIn first place, the balanced reaction is:
2 NaCl + H₂SO₄ → Na₂SO₄ + 2 HCI
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
NaCl: 2 moles H₂SO₄: 1 mole Na₂SO₄: 1 mole HCI: 2 molesThe molar mass of the compounds is:
NaCl: 58.45 g/mole H₂SO₄: 98 g/moleNa₂SO₄: 142 g/moleHCI: 36.45 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
NaCl: 2 moles ×58.45 g/mole= 116.9 grams
H₂SO₄: 1 mole ×98 g/mole= 98 grams
Na₂SO₄: 1 mole ×142 g/mole= 142 grams
HCI: 2 moles ×36.45 g/mole= 72.9 grams
Limiting reagentThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
Limiting reagent in this reactionTo determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 116.2 grams of NaCl reacts with 98 grams of H₂SO₄, 22 grams of NaCl reacts with how much moles of H₂SO₄?
\(mass of H_{2} SO_{4} =\frac{22 grams of NaClx98 grams of H_{2} SO_{4} }{116.2 grams of NaCl}\)
mass of H₂SO₄= 18.55 grams
But 18.55 grams of H₂SO₄ are not available, 21 grams are available. Since you have less moles than you need to react with 22 grams of NaCl, H₂SO₄ will be the limiting reagent.
Mass of Na₂SO₄ producedThe following rules of three can be applied, considering the limiting reagent: if by reaction stoichiometry 116.9 grams of NaCl form 142 grams of Na₂SO₄, 22 grams of NaCl form how much mass of Na₂SO₄?
\(mass of Na_{2}S O_{4} =\frac{22 grams of NaClx142 grams of Na_{2}S O_{4}}{116.9 grams of NaCl}\)
mass of Na₂SO₄= 26.72 grams
Then, 26.72 grams of Na₂SO₄ are formed when 22 grams of NaOH reacts with 21 grams of H₂SO₄. The correct answer is first option.
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]All organic compounds contain the element carbon but, not all compounds containing the element “carbon”are organic .Justify this statement.
Answers
The statement "All organic compounds contain the element carbon, but not all compounds containing the element 'carbon' are organic" can be justified based on the definition and characteristics of organic compounds.
Organic compounds are compounds primarily composed of carbon and hydrogen atoms, often with other elements like oxygen, nitrogen, sulfur, and phosphorus. These compounds are typically associated with living organisms and are known for their unique properties and behavior, including the ability to form complex structures, exhibit covalent bonding, and undergo organic reactions.
On the other hand, there are compounds that contain carbon but are not classified as organic. One notable example is carbon dioxide (\(CO_{2}\)), which is a simple inorganic compound composed of carbon and oxygen. Carbon dioxide does not possess the characteristic properties of organic compounds, such as the ability to form long chains or undergo organic reactions.
Additionally, there are inorganic compounds like carbonates (such as calcium carbonate) and carbides (such as calcium carbide) that contain carbon but are not considered organic. These compounds have distinct chemical and physical properties different from those of organic compounds.
In summary, while all organic compounds contain carbon, not all compounds containing carbon are organic. The classification of a compound as organic or inorganic depends on its overall molecular structure, bonding, and characteristic properties.
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If element X has 6 valence electrons, what is the formula between element X and
magnesium.
a. X6Mg2
b. MgX3
c. MgX
d. XMg
Answers
Indicate how CaCO3 neutralizes soil acidity. In other words, indicate how calcium carbonate chemically removes hydrogen from soil solution.
Answers
Answer:
Soil acidity can be corrected easily by liming the soil, or adding basic materials to neutralize the acid present. ... As lime dissolves in the soil, calcium (Ca) moves to the surface of soil particles, replacing the acidity. The acidity reacts with the carbonate (CO3) to form carbon dioxide (CO2) and water (H2O).
Explanation:
what is the correct parent name for an organic compound just one carbon
Answers
Answer:
Meth- its full name is Methane
Explanation:
1 methane
2 ethane
3 propane
4 butane
5 pentane
6 hexane
7 heptane
8 octane
9 nonane
10 decane
11 undecane
12 dodecane
Plate Tectonic Theory is the theory that the world was once 1 continent called Pangea.
O True
O False
Answers
Answer:
true
Explanation:
There are three sets of sketches below, showing the same pure molecular compound (hydrogen chloride, molecular formula HCl) at three different temperatures. The sketches are drawn as if a sample of hydrogen chloride were under a microscope so powerful that individual atoms could be seen. Only one sketch in each set is correct. Use the slider to choose the correct sketch in each set. You may need the following information: melting point of HCl: -114.8 °C boiling point of HCl: -85.1 °C C A DODODODO 5 3. C -124. "C -105. C ? X
Answers
As per the temperature, the molecules of a substance act differently. The melting point is -114.2 °C and The boiling point of hydrogen chloride (HCl) is -85.05 °C. The correct sketch in each set is as follows:
Thus, if the temperature is kept above -85.05 °C, the molecules will be placed widely apart and will be in the gaseous state, revealing their properties.
If the temperature is between -114.2 °C and -85.05 °C, the molecules will be organized in layers capable of slipping over one another since they will be in a liquid state.
At last, the molecules will be arranged in an orderly manner because they will be in a solid state if the temperature is below -114.2 °C.
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A student pours 50 g of hot water at 72 °C into a Styrofoam cup with 50 g of water at 25
°C. After a few minutes the water temperature is 43 °C. How much heat did the cup itself
absorb? (Hint Q for hot water = Q of cold water and Q for the cup. You do not need to
know the mass of the cup).
PLEASE HELP ASAPP
Answers
The amount of heat energy absorbed by the cup, given that 50 g of hot water at 72 °C was poured into the styrofoam cup with 50 g of water at 25 °C is 2301.2 J
How do i determine the heat absorbed by the cup?First, we shall obtain the heat absorbed by the cold water. Details below:
Mass of cold water (M) = 50 gInitial temperature of cold water (T₁) = 25 °CFinal temperature of cold water (T₂) = 43 °CChange in temperature (ΔT) = 43 - 25 = 18 °C Specific heat capacity of water (C) = 4.184 J/gºC Heat absorbed by cold water (Q) =?Q = MCΔT
Q = 50 × 4.184 × 18
Q = 3765.6 J
Next, we shall obtain the heat release by the hot water
Mass of hot water (M) = 50 gInitial temperature of hot water (T₁) = 72 °CFinal temperature of hot water (T₂) = 43 °CChange in temperature (ΔT) = 43 - 72 = -29 °C Specific heat capacity of water (C) = 4.184 J/gºC Heat release by hot water (Q) =?Q = MCΔT
Q = 50 × 4.184 × -29
Q = -6066.8 J
Note: The negative shows that heat is released.
Finally, we shall obtain the heat absorbed by the cup. Details below:
Heat absorbed by cold water = 3765.6 JHeat release by hot water = 6066.8Heat absorbed by cup = ?Heat absorbed by cup = Heat release by hot water - heat absorbed by cold water
Heat absorbed by cup = 6066.8 - 3765.6
Heat absorbed by cup = 2301.2 J
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CxHy +O2 --> H2O + CO2
Question 1 options:
Decomposition
Combustion
Synthesis
Single Displacement
Look down below at the picture thank you
Answers
Single displacement because the oxygen is not balance
5. What is the function of the stomach?*
A. To remove water and excrete fiber and waste
B. To break down starches and other complex carbs to glucose
C. To break down large food molecules into small food molecules
D. To absorb small food molecules into the body.
Answers
Digestion
What is the pH of a neutral solution at 25ºC?
a. 14
b. 0
c. 1
d. 7
Answers
Answer:
d.7 is the correct answer
What is the volume of a gas 622.7 mL at 25.1 C if the temperature is increased to 60.7 C without changing the pressure, what is the new volume of the gas?
A. 697
B. 556
C. 1510
D. 9.35
Answers
Answer:
A) 697 mL
Explanation:
First convert degrees Celsius to Kelvin.
That gives;
For T1; temp 1 (273 + 25.1)
= 298.1K
T2; temp 2 (273+60.7)
=333.7K
From the formula, (V1/T1) = (V2/T2)
To find V2 = (V1/T1) × T2
= (622.7/298.1) × 333.7.
= 697.06mL
~~ 697mL
reaction will be spontaneous at all temperatures if _____
Answers
If a reaction has a negative ΔG and a positive ΔS, the reaction will be spontaneous at all temperatures.
If a reaction is spontaneous at all temperatures, it implies that the reaction will occur without the need for any external intervention, such as the addition of energy. For a reaction to be spontaneous, it must satisfy the criteria of thermodynamic favorability, which is determined by the change in Gibbs free energy (ΔG) associated with the reaction.
The relationship between ΔG, temperature (T), and the equilibrium constant (K) of a reaction is described by the equation ΔG = ΔH - TΔS, where ΔH is the change in enthalpy and ΔS is the change in entropy.
To ensure spontaneity at all temperatures, two conditions must be met:
ΔG must be negative: A negative ΔG indicates a thermodynamically favorable reaction, meaning the products have a lower Gibbs free energy than the reactants. If ΔG is negative, the reaction will proceed spontaneously in the forward direction.
ΔS must be positive: A positive ΔS signifies an increase in the overall entropy of the system. Higher entropy means more disorder, and spontaneous reactions often involve an increase in randomness. When ΔS is positive, it can compensate for the enthalpic term, ΔH, allowing the reaction to proceed spontaneously.
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Arrange these species into isoelectronic groups. It does not matter which group goes in which box, so long as the correct species are grouped. Isoelectronic group A Isoelectronic group B Isoelectronic group C Answer Bank
Answers
The species to be arranged are;
Sr2+, N3-, Li+, Ne, Br-, B3+, Al3+, He, Y3+
Answer:
Group A (10 electron species)
Al^3+, Ne, N^3-
Group B (36 electron species)
Sr^2+, Y^3+, Br^-
Group C ( 2 electron species)
He, Li^+, B^3+
Explanation:
Atoms and ions that have the same electron configuration are said to be isoelectronic. The species may not belong to the same group in the periodic table but are connected by the fact that they all have the same number of electrons. Cations and anions may belong to the same group of isoelectronic species provided that they all have the same number of electrons and the same electronic configuration.
Hence, in each group of isoelectronic species, one electronic configuration can be written for all the species and it will accurately represent the number of electrons for all species in the group since they have the same number of electrons.
For instance, all group C members have the electronic configuration, 1s2. This means that they all possess only two electrons.