Which element will have properties most similar to those of potassium?
Potassium is a very reactive metal and does not occur free in nature. A diagram of a potassium atom is shown.
Select one:
sodium
phosphorous
chlorine
argon
Answers
Related Questions
Identify the independent variable, dependent variable, and constants.
1) Water, Soil, and Sunlight
2) Fertilizer Brand / Nutrients
3) Plant Height
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Answer:
One must start with a hypothesis. In this case it is that plant growth is affected by fertilizer.
Explanation:
The dependent variable is plant growth. It is important that the plant are all the same, and there needs to be enough of them to achieve statistical significance. Before hand, You estimate the variability in plant growth and decide what level of significance you want to achieve. For example, you want to draw conclusions with 95% confidence. The independent variable is the fertilizer used ott (over the top) withheld. There needs to be a control group without fertilizer treated exactly as the group with fertilizer.
What needed to be present in marine mud to form fossil fuels?
Answers
Carbon and Hydrogen.
Answer:
Mostly decaying organisms are needed to present in marine mud to form fossil fuels.
Explanation: When organisms and plants died and sank to the bottom of swamps and oceans, brown soil-like materials called peat are formed. Over millions of years, the peat became covered with sand, clay and other minerals and the peat is converted into layers of sedimentary rocks. After a long time, different type of fossil fuels are formed.
When the speed of the bottle is 2 m/s, the KE is kg m2/s2. When the speed of the bottle is 3 m/s, the KE is kg m2/s2. When the speed of the bottle is 4 m/s, the KE is kg m2/s2. When the speed of the bottle is 5 m/s, the KE is kg m2/s2. When the speed of the bottle is 6 m/s, the KE is kg m2/s2.
instructions
In this part of the experiment, you will be changing the speed of the bottle by dropping it from different heights. You will use the same mass, 0.250 kg, for each trial, so record this mass in Table B for each velocity. Then, calculate the expected kinetic energy (KE) at each velocity. Use the formula KE = mv2,
where m is the mass and v is the speed. Record your calculations in Table B of your Student Guide.
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Answer:
Based on the given instructions, you need to calculate the expected kinetic energy (KE) at each velocity using the formula KE = mv^2, where m is the mass and v is the speed. The mass is given as 0.250 kg.
Table B: Calculation of Kinetic Energy (KE)
Table B: Calculation of Kinetic Energy (KE)
Speed (m/s)Mass (kg)KE (kg m^2/s^2)20.2500.50030.2500.75040.2501.00050.2501.25060.2501.500
To calculate the kinetic energy at each velocity, multiply the mass (0.250 kg) by the square of the velocity.
For example, when the speed of the bottle is 2 m/s: KE = (0.250 kg) * (2 m/s)^2 = 0.250 kg * 4 m^2/s^2 = 1.000 kg m^2/s^2
Perform similar calculations for the other velocities and record the results in Table B.
Answer:
Explanation:mass of the bottle in each case is M = 0.250 kg
now as per given speeds we can use the formula of kinetic energy to find it
1) when speed is 2 m/s
kinetic energy is given as
2) when speed is 3 m/s
kinetic energy is given as
3) when speed is 4 m/s
kinetic energy is given as
4) when speed is 5 m/s
kinetic energy is given as
5) when speed is 6 m/s
kinetic energy is given as
What type of person studies and collects data on the weather?
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Which of the following is correct?
A reactants <- products
B reactants products
C reactants →p products
D reactants = products
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Answer:c..................
c
explanation
help pls i will give brainlest
Answers
Answer: its 5ft tall and 12 inches
Explanation:
need help badly please !
Answers
Answer:ok
Explanation:
The images below show two atoms. Using the document and a periodic table, determine the following:
Please answer all parts for full credit! (TOTAL POINTS = 14 pts)
a) What elements are depicted? (2pts)
b) How is each element classified (metal, nonmetal, metalloid)? (2pts)
c) What type of bond would form between these two atoms? (2pts)
d) What would the compound formed between these atoms be named? (4pts)
e) What would the formula be? (4pts)
Answers
Answer:
d
Explanation:
a) Atom 1 has 35 protons and 45 neutrons, which means it is the element bromine (Br). Atom 2 has 12 protons and 12 neutrons, which means it is the element magnesium (Mg).
What is a metalloid?A metalloid is an element that acquires both metal and nonmetal properties. Metalloids have some characteristics of metals, such as being good conductors of electricity, while also having some nonmetallic properties such as being brittle and lacking the ability to be hammered into shape. They are located along the "staircase" on the periodic table, between the metals and nonmetals, and include elements such as boron, silicon, germanium, arsenic, antimony, and tellurium. Metalloids are important in various applications such as semiconductor industry, in which silicon is the most widely used metalloid for the production of computer chips and solar cells.
b) Bromine (Br) is a nonmetal and magnesium (Mg) is a metal.
c) Magnesium (Mg) is a metal and bromine (Br) is a nonmetal, so they would form an ionic bond.
d) The compound formed between magnesium (Mg) and bromine (Br) would be named magnesium bromide.
e) The formula for magnesium bromide is MgBr2, since magnesium (Mg) has a +2 charge and bromine (Br) has a -1 charge.
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Hi! Which of the following decreases kinetic energy of solvent molecules? ( I need this handed in quickly!)
A. Decreasing the pressure
B. Not stirring the solution
C. Decreasing the contact area between solvent and solute
When a drop of water sits on a leaf, It looks like it has a skin. What is this “skin” a result of? Explain.
What does adding soap do in terms of dissolving solutes? Explain.
Which solution will contain a higher concentration of iodide ions, 0.25 mol/L calcium iodide or .45 mol/L potassium iodide?
Thank you so much! I hope you have a great day!❤️
Answers
Answer:
c
Explanation:
According to the forces of attraction, decreasing the contact area between solvent and solute decreases kinetic energy of solvent molecules.
What are forces of attraction?Forces of attraction is a force by which atoms in a molecule combine. it is basically an attractive force in nature. It can act between an ion and an atom as well.It varies for different states of matter that is solids, liquids and gases.
The forces of attraction are maximum in solids as the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.
The physical properties such as melting point, boiling point, density are all dependent on forces of attraction which exists in the substances.
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What is Waves? Please help will give brainliest
Answers
Answer:
Waves involve the transport of energy without the transport of matter. In conclusion, a wave can be described as a disturbance that travels through a medium, transporting energy from one location (its source) to another location without transporting matter.
Explanation:
hope this helps, I tried to give an easy definition :)
What is the charge on the Cr in Cr2O72-
Answers
Answer:
+6.
Explanation:
So, a chromium atom here has an oxidation number of +6.
Calculate the ΔHrxn for the following
Fe2O3(s)+3CO→Fe(s)+3CO2(g)
Given:
4Fe(s)+3O2(g)→2Fe2O3(s)
ΔH = -1645.36
2CO2(g)→2CO(g)+O2(g)
ΔH = 567.66
Answers
Answer: alright now listen fe203(s)=567.66666
Explanation:
A thickness of a material is a factor that affects heat conductivity. Does heat flow faster through a thick or a thin piece of the same material?
The surface area of a material is a factor that affects heat conductivity. Does heat flow faster through a large surface area or through a small surface area? Why? (Hint: Think about the number of particles available to bump into one another).
Change in temperature is a factor that affects heat conductivity. Will heat flow faster when there’s a large change in temperature or a small change in temperature?
Answers
Answer: It would flow through a thin piece of material easier.
Explanation:
Answer:It would flow through a thin piece of material easier.
Which of the following statements fully describes what an object may do when it experiences unbalanced forces? Select the two best answers.
A. It may change directions.
B. It will move at a constant speed.
C. It may slow down.
D. It may slow down or speed up.
E. It will stay stationary.
Answers
Answer:b
Explanation:
which chemical process is illustrated below?
Answers
Answer:
I believe it is D, Dehydration synthesis of amino acids to form a dipeptide
The process of respiration is like a(n) __________.
Press enter to interact with the item, and press tab button or down arrow until reaching the Submit button once the item is selected
A. Elemental reaction
B. Synthesis reaction
C. Combustion reaction
D. Decomposition reaction
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Answer:
c.combustion reaction
What are the four main categories of stars?
How does each of these types of stars differ in size, brightness, and temperature? *Answer both, please!* :)
Answers
Answer:
Read below:
Explanation:
1. The four main categories of stars are:
O-type stars: These are the hottest and most massive stars. They are extremely bright and have surface temperatures of more than 30,000 K.B-type stars: These stars are slightly cooler and less massive than O-type stars. They have surface temperatures of around 10,000 K and are also very bright.A-type stars: These stars are cooler and less massive than B-type stars. They have surface temperatures of around 7,500 K and are relatively bright.M-type stars: These stars are the coolest and least massive of the four categories. They have surface temperatures of less than 3,500 K and are not very bright.2. In general, O-type stars are the largest and most luminous, while M-type stars are the smallest and least luminous. B-type and A-type stars fall in between these two extremes in terms of size, brightness, and temperature. However, there is a lot of variation within each of these categories, and there is not a hard and fast rule for how these characteristics relate to one another. The size, brightness, and temperature of a star depend on a variety of factors, including its mass, age, and composition.
How to work out the relative mass of potassium? What is the calculation? ( explained very easily )
Answers
Answer:
39
Explanation:
Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.
———————————
(1/12)th Mass of one C12 atom
I am a metalloid. I am in the nitrogen family and row 4. I have an atomic mass of 74.92. I can be used as a poison. Who am I?
Answers
Arsenic has an atomic mass of 74.92, is a well known poison, and a metalloid.
Answer:
As – Arsenic
Explanation:
Let's break this down step by step. Make sure you have a periodic table to reference.
"I am a metalloid" – We will be looking towards the right side of the periodic table. The possible choices are boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), and astatine (At).
"I am in the nitrogen family" – Families are elements grouped by columns. The nitrogen family is group 15. The possible choices are now arsenic (As) and antimony (Sb).
"and row 4" – Counting from the very top (don't forget row 1 of hydrogen and helium), we can see that arsenic (As) is in the 4th row.
"I have an atomic mass of 74.92" – Arsenic (As) does have an atomic mass of 74.92, which confirms our answer.
Hope this helps!
____ relating to the separation of charges in a molecule
___ meaning to repel water, literally “fear of water”
__ this term describes the force of attraction between adjacent water molecules.
___ meaning attracted to water or literally “water loving”
___ term describing the tensional force created by water at its boundary with air
Word bank: Hydrophobic, Hydrophilic, surface tension, cohesion, polarity
Answers
Answer:1.polarity
2. Hydrophobic
3. Cohesion
4. Hydrophilic
5. Surface tension
Explanation:
The map shows watersheds with a high potential for soil, nitrogen, and pesticide runoff. If you were in charge of handling the problem of pollution from surface runoff in US watersheds, what would you need to know to help you come up with a solution? Write down at least five questions you would ask an expert to help you understand the data shown in the map and design a solution to the problem.
Answers
Answer:
Here are some possible answers:
Why are watersheds in the Midwest more prone to pollution in than other areas in the country?
What are the current flood and pollution control measures in place in high-risk regions?
What are the flaws with the systems used to control pollution in high-risk regions?
What can the officials and scientists in one region learn from those in another region?
What would the effects on residents be if we made changes to current flood and pollution control measures?
Explanation:
When manure or commercial fertilizers enter surface water, the nutrients they release stimulate microorganism growth. The growth and reproduction of microorganisms reduce the dissolved oxygen content of the water body. Without sufficient dissolved oxygen in surface water, fish and other aquatic species suffocate.
Describe how minerals form.
Type your answer here:
(Score for Question 2: ___ of 5 points)
How does the arrangement of the atoms in a mineral relate to its properties?
Type your answer here:
PLS HURRY 30 POINTS!!
Answers
Answer : Minerals can form on the surface through evaporation of solutions containing dissolved minerals. Minerals can form beneath the surface when dissolved elements and compounds leave a hot water solution or when materials melted in magma/ lava then cools & hardens.
How does the arrangement of the atoms in a mineral relate to its properties?
The atoms in a mineral are arranged in an organised 'atomic structure'. They connect together to form molecules, and the molecules stack together in a regular pattern to form a crystal. The shape of a crystal depends on the way the molecules are stacked up inside it.
Explain how your model is different from the model in the picture.
Answers
Answer:
it is circle
Explanation:
Answer: supongo que te refieres a el cubo de
Explanation:
Partículas, se diferencia con la función HD
Fish are invertebrates, and all animals are equal so does this mean that each individual animal is equivalent?
A. no
B.yes
C.kinda.
D.none of the above
Answers
Answer:no
Explanation:
because there are different bone structures to different animals
ex.mammals aren't invertabres
Answer:
A. no
Explanation:
The other person is right.
Which substance is a polymer found in nature?
Answers
Answer:
wool, silk, cellulose, DNA and proteins.
Explanation:
Some examples of naturally occurring polymers are wool, silk, cellulose, DNA and proteins.
Explanation=
If you worked for an oil company what types of evidence would you look for before directing the engineers to start drilling for oil or gas in a given area?
Answers
Answer:
If working for an oil company and directed to start drilling for oil or gas in a given area, you would want to gather a variety of types of evidence to support this decision. Some types of evidence to consider include:
Geological evidence: You would want to study the geology of the area, including the type of rock formations present, the depth of the rock layers, and the history of the area's geologic activity. This information can help you determine if the area has the potential for oil or gas reserves.
Geophysical evidence: You would want to use various geophysical tools to gather information about the subsurface of the area, including magnetic surveys, seismic reflection surveys, and gravity surveys. These tools can help you determine the location and size of potential oil or gas deposits.
Well data: You would want to review well data from nearby areas, including the depth of the well, the type of rock formations encountered, and any oil or gas reserves found. This information can help you predict the potential for similar reserves in the area.
Environmental data: You would want to review environmental data, including air and water quality, to assess the potential environmental impact of drilling in the area.
Economic data: You would want to review economic data, including the cost of drilling and the potential revenue from oil or gas production, to determine if drilling in the area is financially feasible.
By gathering and analyzing these types of evidence, you can make a more informed decision about whether or not to direct engineers to start drilling for oil or gas in a given area.
Answer:
conducting thorough geological surveys to identify areas with potential oil or gas reserves. This would involve analyzing rock formations, seismic data, and other geological features to determine the likelihood of oil or gas being present. Additionally, I would recommend reviewing historical drilling records and production data to identify areas that have already shown promise. It is important to ensure that drilling operations are conducted in a safe and environmentally responsible manner to minimize potential harm to the surrounding ecosystems and communities.
Explanation:
Which simple machines make up scissors?
A) one lever and one wedge
B) two levers and two wedges
C) one inclined plane and two pulleys
D) two inclined planes and two levers
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pls i need answers to the 1st, 2nd, and 3rd question
Answers
I believe number one has 2 valance electrons
number 2 has 1 valance electron
and number 3 has 8 valance electrons
valance electrons are the electrons on the outermost ring
Dice and pennies have the same mass, but a penny has a smaller volume than a die. Which of these is true about the two objects?
A) A penny contains more matter than a die.
B) A die contains more matter than a penny.
C) A penny and die contain the same amounts of matter, but the matter in the penny is packed into less space.
D)A penny and die contain the same amounts of matter, but the matter in the die is packed into less space.
NEEDS ANSWERS ASAP!!!!!
Answers
Answer:
B) a dice contains more matter than a penny.
A high concentration of hydrogen ions (H+) means a solution is what? (example: HCl aka Hydrochloric Acid)
A) very basic
B) neutral
C) neither acidic or basic
D) very acidic
Answers
Answer:
Explanation: it would be D because hydrogen is very acidic and don't worry i'll always be here to help