Answers
Answer:
Rb<K<Ga<As<Se<S
Explanation:
We must remember that first ionization energy decreases down the group and increases across the period.
First ionization energy decreases down the group because of the addition of more shells which increases the distance between the nucleus and the outermost electron. Hence, Rb has a lower ionization energy that K.
Across the period, increase in the size of the nuclear charge causes the pull of the nucleus on the outermost electrons to increase thereby increasing the ionization energy. Hence ionization energy increases across the period. For this reason, the ionization energy of Ga<As<Se as shown.
Ionization energy is the energy required to remove an electron from an atom of a chemical element. Ionization energy depends on the atomic radius of an element.
Ionization energy and the periodic table.
Ionization energy increase across the period from left to right and decreases along the group from top to bottom on the periodic table.
Ranking the elements from highest to lowest ionization energy, We have:
S - Sulphur
S - SulphurK - Potassium
S - SulphurK - PotassiumRb - Rubidium
S - SulphurK - PotassiumRb - RubidiumSe - Selenium
S - SulphurK - PotassiumRb - RubidiumSe - SeleniumAs - Arsenic
S - SulphurK - PotassiumRb - RubidiumSe - SeleniumAs - ArsenicGa - Gallium
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Ionization energy is a measure of how strongly an atom holds onto its electrons. A higher ionization energy indicates th...
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Related Questions
How many electrons are in the 6p subshell of Rn?
Answers
In the electrical arrangement, the 6p subshell of the radon element contains 6 electrons.
What is electronic configuration of radon?Radon is the 86th element in the periodic table, with the symbol 'Rn'. Radon is a type of noble gas. Radon contains a total of eighty-six electrons. These electrons are grouped in accordance with the laws of several orbits.The p-orbital can hold up to six electrons. As a result, the following six electrons enter the 2p orbital. The second orbit is now completely filled. As a result, the remaining electrons will go into the third orbit.As a result, the entire electron configuration of radon is 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 4f^14 5s^2 5p^6 5d^10 6s^2 6p^6.For more information on electronic configuration kindly visit to
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In the original mixtures, test tube 1 contained magnesium and a zinc compound, and test tube 2 contained zinc
and a magnesium compound. A similar relationship exists between test tubes 3 and 4 and between test tubes 5
and 6. Compare what took place in each corresponding pair of test tubes. What general conclusion can you draw?
Answers
Answer:
Magnesium in tube 3 and copper in tube 5 became compounds
If each of the test tubes contained a less reactive compound and a more reactive element or less reactive element and more reactive compound , in first case chemical change of displacement reaction will occur while in second case no reaction will occur as zinc exists as an element.
What is chemical change?Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
There are three types of chemical changes:
1) inorganic changes
2)organic changes
3) biochemical changes
During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.
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jfvbgbgvcfxfhhgIhhjj
Answers
Answer: what?
Explanation:
Answer: Huh?
Explanation:
2
Which of the following illustrations show atoms of the same element?
A. 1&2
B. 1&4
C. 3&4
D. 2&3
Answers
Answer:
C because they are the same
Dipolar molecules have a positive and negative center at two different points.
True
False
Answers
Dipolar molecules have a separation of charge with a positive center and a negative center located at two different points, resulting in a net dipole moment. The correct option is true
What is Dipolar molecules ?Dipolar molecules are molecules that have a separation of charge, resulting in a positive center and a negative center located at two different points in the molecule.
This separation of charge creates a net dipole moment, which is a measure of the molecule's polarity. The magnitude and direction of the dipole moment depend on the difference in electronegativity between the atoms in the molecule and the molecule's geometry.
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Which of the following is a benefit to creating computer-based models for tracking a hurricane?
People can see if they should prepare to evacuate an area.
Forecasters can determine exactly where the hurricane is likely to make landfall.
Emergency crews can determine the number of floods the hurricane will produce.
all of the above
Answers
Answer: People can see if they should prepare to evacuate an area.
Explanation:
Answer:
a
Explanation:
What did the Copernicus revolution demonstrate?
Answers
What is a common use of bases?
O as a component of vinegar
O as a component of car batteries
O to make foods tart
O to reduce indigestion
Answers
Answer:
it’s D. to reduce indigestion
Explanation:
A common use of bases is to reduce indigestion.
So, first option is correct one.
Why base is use to reduce indigestion?Since, we face indigestion when amount of acidity is increases in the stomach of the human body.So, When we use bases, it neutralize the acidity of the stomach and get recover from acidity.What is the bases?The species which has tendency to loss electron or \(OH^{-1}\) ion is called bases.
Uses of basesSodium hydroxide base is used in manufacture of soap and detergent .Potassium hydroxide is used for production of liquid soap and soft soaps.Potassium hydroxide is used in alkaline batterieslearn about bases,
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A car is traveling at 8km per hour for 3 hours. What is the distance? 33 km 22 km 24 km 30 km
Answers
Answer:24
Explanation:
What nucleus emits an alpha particle and forms Th-234?
Answers
Uranium-238
Explanations:The process by which an atomic nucleus looses energy by radiation is known as radioactivity.
An alpha particle, have an atomic number of 2 and a mass number of 4 as shown;
\(_2^4He\)When this is combined with Th-234, it forms Uranium-238. This shows that the uranium nucleus emits alpha particle to form Th-234 according to the chemical equation below;
\(_{92}^{238}U\rightarrow_2^4He+_{90}^{234}Th\)How many kilojoules of heat will be released when exactly 1 mole of iron, Fe, is burned to form Fe2O3 (s) at standard state conditions? (Use Appendix G in text.)
412 kJ
824 kJ
1650 kJ
Answers
The heat of formation, or enthalpy of formation, of a compound, can be found in a reference such as the appendix of a textbook or a thermochemistry table. The heat of the formation of Fe2O3(s) is -824 kJ/mol. It represents the heat change that occurs when one mole of Fe2O3 is formed from its elements under standard state conditions. So the answer is 824 kJ will be released.
The heat of formation, also known as enthalpy of formation, is the heat energy change that occurs when a substance is formed from its element under standard state conditions. It is usually expressed in kJ/mol.
When we are dealing with the combustion of a substance, this value is used to determine how much heat is released or absorbed in the process. In this case, the substance is iron and we need to form Fe2O3.
To find the amount of heat released, we can use the heat of formation value of Fe2O3, which is -824 kJ/mol.
Since the value is negative, this means that 824 kJ of heat is released when 1 mole of Fe is burned to form Fe2O3 under standard state conditions.
It is also important to note that these values are usually provided at a specific temperature, usually at 25 degrees Celsius, and standard pressure.
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cf2br2 structural formula
Answers
Answer:
Here, this may help you:
https://brainly.in/question/28298343
Explanation:
in the bronsted Lowry definition of acids and the base, an acid and
A) is a proton donor B breaks stable hydrogen bonds C) corrodes metals D) form is stable hydrogen bonds
Answers
Answer: A (acid is a proton donor)
Explanation:
Bronsted-Lowry Definition
Acids are proton (H⁺) donors.Example: HCl is a strong acid and it donates a proton to water when both are in a solution. Water is the base because it accepted the proton from water to form H₃O⁺.Bases are proton (H+) acceptors.Example: NH₃(aq) + H₂O(l) <--> NH₄⁺(aq) + OH⁻(aq). In this reaction, NH₃ is the base because it accepted the proton from water, and water is the acid because it donated a proton to NH₃.· Amphoteric means some substances act as an acid or base, depending on the reaction. Water is a good example of an amphoteric substance because it can donate or accept a proton.what is the molarity of a solution of AgNO3 of 98.1 moles of silver nitrate are dissolved to make 0.250L of solution
Answers
The molarity or molar concentration is calculted by dividin the number of moles of solute, n, by the total volume of the solution, V, and normally presented in mol/L.
So:
\(C=\frac{n}{V}\)We know that the number of moles of AgNO₃ is 98.1 mol and the volume is 0.250 L, so the molarity, C, will be:
\(C=\frac{n}{V}=\frac{98.1mol}{0.250L}=392.4mol\/L\approx392mol\/L\)So, the molarity will be approximately 392 mol/L.
An electron in a hydrogen atom moves from level 3 to level 1. In a second hydrogen atom, an electron drops from level 2 to level 1. Which statement describes the most likely result?
Answers
Answer:
An electron in a hydrogen atom moves from level 3 to level 1. In a second hydrogen atom, an electron drops from level 2 to level 1. Which statement describes the most likely result? The first atom emits light with more energy.
Calculate how many miles of Al are needed to react
Answers
Step 1
The equation provided:
2 Al + 3 FeO => Al2O3 + 3 Fe (completed and balanced9
------------------
Step 2
Information provided:
1.20 moles of FeO
-------------------
Step 3
By stoichiometry, procedure:
2 Al + 3 FeO => Al2O3 + 3 Fe
2 moles Al ----------- 3 moles FeO
X ---------- 1.20 moles FeO
X = 1.20 moles FeO x 2 moles Al/3 moles FeO
X = 0.80 moles
Answer: 0.80 moles
hydrogen bond is a strong dipole interaction for example water and other molecules true or false
Answers
Answer:
hydrogen bond is a type of dipole-dipole interaction; it is not a true chemical bond it is a mere electrostatic attraction. These attractions can occur between molecules or within different parts of a single molecule. Intramolecular hydrogen bonds are those which occur within one single molecule.
Explanation:
CAN I GET BRAINLIEST
List the 2 pKa's for H2SO4
Answers
Convert −319 ∘F to kelvins.
Answers
Answer:
it is 78.15 Kelvins
Explanation:
-319 Fahrenheit to 78.15 Kelvins
What mass (grams) of antimony(III) chloride would be produced by reacting with 112 liters of chlorine measured at STP?
Answers
Answer:
radius = 16 in ; height = 27 in
2. A gas has volume of 4.2L at 110 kPa. If temperature is constant, find the pressure of gas when the volume is change to 11.3L.
Answers
Answer:
40.88 kPa.
Explanation:
Given that,
Volume, V₁= 4.2 L
Pressure, P₁ = 110 kPa
We need to find the pressure of the gas when the volume is changed to 11.3L at constant temperature.
According to Boyle's law, at constant temperature, volume is inversely proportional to the pressure. Mathematically,
\(P_1V_1=P_2V_2\\\\P_2=\dfrac{P_1V_1}{V_2}\\\\P_2=\dfrac{4.2\ L\times 110\ kPa}{11.3\ L}\\\\P_2=40.88\ kPa\)
So, the new pressure is 40.88 kPa.
Of the following elements, which has the lowest electronegativity?
Br
Cl
Ca
Mg
Answers
1. If 4.0 L of gas in the lungs have a pressure of 1.0 atm and are kept at body temperature (37 degrees Celsius), how many
moles are present in the lungs? Show your work.
Answers
There are approximately 0.16 moles of gas present in the lungs.
Steps
To solve this problem, we can use the ideal gas law, which relates the pressure (P), volume (V), number of moles (n), and temperature (T) of a gas:
PV = nRT
where R is the gas constant.
First, we need to convert the temperature to Kelvin:
T = 37°C + 273.15 = 310.15 K
Next, we can plug in the given values:
P = 1.0 atm
V = 4.0 L
T = 310.15 K
We also need to find the value of R, which depends on the units we are using for pressure, volume, and temperature. In this case, we are using atmospheres, liters, and Kelvin, so we can use the value:
R = 0.08206 L·atm/K·mol
Now we can rearrange the ideal gas law to solve for the number of moles:
n = PV/RT
n = (1.0 atm)(4.0 L)/(0.08206 L·atm/K·mol)(310.15 K)
n = 0.1638 mol
Therefore, there are approximately 0.16 moles of gas present in the lungs.
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What is known about a reaction with a positive enthalpy?
A. Heat is given off as a product of the reaction.
B. The reaction has a large activation energy.
OC. Heat is required to make the reaction occur.
OD. The reaction will never be spontaneous.
Answers
Answer: C
Explanation:
In endothermic reactions, enthalpy is positive, and in exothermic reactions, enthalpy is negative, So, if enthalpy is positive, then it is an endothermic reaction, and hence is required for the reaction to occur.
What are quarks?
A. Particles that bind gluons together within the nucleus
B. Radioactive material that is emitted from a nucleus
C. Subatomic particles that make up protons and neutrons.
D. Fundamental forces acting between two pieces of matter
Answers
Answer:
D. Fundamental forces acting between two pieces of matter
Answer:
D. Fundamental forces acting between two pieces of matter
Which of the following represents the velocity of a moving object?
Select one:
40 m north.
40.
40 m/s north.
40 m/s.
Answers
Answer:
The correct answer would be 40 m/s
Explanation:
The reason 40 m/s is the correct answer is because m/s stands for meters per second.
Hope this helps you with what you're working on! :D
Answer:
40 m/s north
Explanation:
Velocity is a vector quantity, so it have both direction and magnitude.
Starting with 0.3500 mol CO(g) and 0.05500 mol COCl2(g) in a 3.050 L flask at 668 K, how many moles of CI2(g) will be present at equilibrium?
CO(g) + Cl2(g)》COCl2(g)
Kc= 1.2 x 10^3 at 668 K
Answers
At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.
1: Write the balanced chemical equation:
\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)
2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.
Initial:
\(C_O\)(g) = 0.3500 mol
\(Cl_2\)(g) = 0.05500 mol
\(C_OCl_2\)(g) = 0 mol
Change:
\(C_O\)(g) = -x
\(Cl_2\)(g) = -x
\(C_OCl_2\)(g) = +x
Equilibrium:
\(C_O\)(g) = 0.3500 - x mol
\(Cl_2\)(g) = 0.05500 - x mol
\(C_OCl_2\)(g) = x mol
3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:
Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]
4: Substitute the given equilibrium constant (Kc) value into the expression:
1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)
5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:
1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x
6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.
7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.
8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):
\(Cl_2\)(g) = 0.05500 - x
9: Calculate the value of \(Cl_2\)(g) at equilibrium:
\(Cl_2\)(g) = 0.05500 - x
\(Cl_2\)(g) = 0.05500 - (positive value of x)
10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.
Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.
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what is the answer to this question
Answers
Some advocates of anabolic steroid use report that testicular atrophy associated with use of trenbolone can be alleviated if users also inject themselves with human chorionic gonadotropin, a hormone similar in structure and function to LH and FSH. Please explain how this treatment might work.
Answers
Answer:
Human chorionic gonadotropin (HCG) injections are much safer to use with some mild side effects to treat issues of testicular atrophy. Human chorionic gonadotropin (HCG) injections would increase blood flow and enable the testes' produce testosterone, reduce the shrinkage of the testicles and it also aids in the production of sperm cells which has been initially impaired due to testicular atrophy.
Explanation:
Anabolic steroid is a drug that plays the role of testosterone.
Testicular atrophy is the shrinkage of the testicles caused by old age or infections. Once it occurs, it lowers the production of testosterone and sperm cells.
Trenbolone increases muscle building, aids lean fat deposition, reduces the production of testosterone, and could also lead to testicular atrophy.
how would you write 500 milliliters?
plz
Answers
500 divided by 10 is 50 centimeters
Answer:
0.5 meters
Explanation:
It depends on what you want to write it as