Answer:
D. Na has a larger radius than Na+ because Na+ has lost its outermost energy shell.
Explanation:
The radius is larger because the diameter of Na+ is larger.
Sodium has smaller atomic radius than sodium cation because sodium has expanded electron cloud.
What is atomic radius?
Atomic radius is defined as the distance between outermost shell and the nucleus. Atomic radius varies across the periodic table where in groups it increases due to the fact that new shells are added on moving sown the group.
While in a period it decreases from left to right across the periodic table as electrons are added to the same shell which causes contraction of the atom.In case of comparison between an atom and a cation an atom has smaller atomic radius due to presence of electrons while in case of ions atomic radius is smaller as they have less number of electrons.
Atoms have expanded electron cloud while the electron cloud in case ions is small , the reason being the presence of large number of electrons in case of atoms and less number of electrons in case of ions.
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An electron moved from a lower energy level to a higher energy level. What most likely happened during the transition? (4 points)
Group of answer choices
A random amount of light was released.
A fixed amount of energy was absorbed.
A fixed amount of energy was released.
A random amount of light was absorbed.
Answer:
A. A random amount of light was released
Explanation:
A random amount of light was released. Hence, option A is correct.
What are electrons?An electron is a negatively charged subatomic particle. It can be either free (not attached to any atom) or bound to the nucleus of an atom. Electrons in atoms exist in spherical shells of various radii, representing energy levels. The charge on a single electron is considered the unit electrical charge.
Electrons are sub-atomic particles that occupy energy levels in an atom of any chemical element. These electrons may move from one energy level to another.
Electrons may move from a lower energy level or ground state to an excited state or high energy level, or else move from a higher energy level to a lower energy level.
When an electron moves from a lower energy level to a higher energy level energy is absorbed by the atom, and when the movement is from a higher energy level to lower energy is released mainly as light.
Hence, option A is correct.
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Did you know that
1-7=0
Answer:
No I didn’t
Explanation:
What do the electron configurations of the elements Mo and Pt have in common?
Answer:
All of the elements in a period have the same number of atomic orbitals. For example, every element in the top row (the first period) has one orbital for its electrons. All of the elements in the second row (the second period) have two orbitals for their electrons.
Explanation:
3. A baseball bat striking a baseball and sending it toward left field is an example
of energy transformation. True or false. Please help it’s due tomorrow!!!
Answer:
TRUE
Explanation:What is the value of c?
56.70
Due to the lack of information provided, the best I can give you is this:
In Chemistry, the letter c most commonly refers to specific heat, which is present in the ratio J/g°C.
Hope it helps :)
is a single cell the smallest structure that carries out our activities nesscesary for life
yep, the cell is the smallest unit in a living organism that is capable of carrying out all of the activities of life.
A 16.0 L container at 333 K holds a mixture of two gases with a total pressure of 7 atm. If there are 2.72 mol of Gas A in the mixture, how many moles of Gas B are present?
A flower vase placed on the table
Explanation:
A laborer pushing a crate on the table
A 16.0 L container at 333 K holds a mixture of two gases with a total pressure of 7 atm. If there are 2.72 mol of Gas A in the mixture, no. of moles of Gas B are 1.376.
What is combined gas law?The combined gas law is the law of of gaseous state which is made by combination of Boyle's law, Charle's law, Avogadro's law and Gay Lussac's law.
It is a mathematical expression that relates Pressure, Volume and Temperature.
(P1 × V1)÷T1 = (P2 × V2)÷T2
We can also use the following relation-
PV = nRT
Let n be the total no. of moles.
Given,
P = 7 atm
R = 0.0821
T = 333K
V = 16 L
n = PV / RT
n = 4.096
n = no. of moles of A gas + no. of moles of gas B
4.096 = 2.72 + x
x = 1.376
Therefore, A 16.0 L container at 333 K holds a mixture of two gases with a total pressure of 7 atm. If there are 2.72 mol of Gas A in the mixture, no. of moles of Gas B are 1.376.
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. Identify molecules of elements;
O2, NH3, He
Elements can be made of one atom, like He, or be elemental molecules, such as hydrogen (H2), oxygen (O2), chlorine (Cl2), ozone (O3), and sulfur (S8). Atoms are not drawn to scale. Some elements are monatomic, meaning they are made of a single (mon-) atom (-atomic) in their molecular form...
Nicole pushes her bike up a hill. Overhead, the sun exerts a gravitational force on Earth. Which statement is true about the bike and Earth?
They both experience contact forces.
They both experience non-contact forces.
The bike experiences a non-contact force and Earth experiences a contact force.
The bike experiences a contact force and Earth experiences a non-contact force.
Answer: c
Explanation:
calculate the mass of butane needed to produce 64.1 g of carbon dioxide to three significant figures and appropriate units
Answer:
21.2 gm
Explanation:
calculate the mass of butane needed to produce 64.1 g of carbon dioxide to three significant figures and appropriate units
butane is the hydrocarbon C4H10
in combustion, we react hydrocarbons with O2 to form CO2 and H2O
so
C4H10 + O2----------------> CO2 + H2O
BALANCE
2C4H10 + 1302--------> 8CO2 + 10 H2O
the molar mass of CO2 is 12 + 16X2 = 44
64.1 gm of CO2 is
64.1/44 = 1.46 MOLES OF CO2,
FOR EVERY 8 MOLES OF CO2 WE NEED 2 MOLES OF BUTANE IT IS A
8:2 OR 4:1 RATIO. THE MOLES OF C4H10 ARE 1/4 THE MOLES OF CO2
SO
THE MOLES OF C4H10 H10 ARE 1.46/4 =0.365 MOLES
THE MOLAR MASS OF BUTANE IS 58.12
0.365 MOLES OF C4H10 HAS A MASS OF 0.365 X 58.12 = 21.2 gm
describe the motion and arrangement of particles in a solid, a liquid, and a gas.
Answer:
gas vibrate and move freely at high speeds. liquid vibrate, move about, and slide past each other. solid vibrate (jiggle) but generally do not move from place to place.
Hopefully this helped!
what is distillation used to seperate
Distillation is used to separate liquids from nonvolatile solids as in separation of alcoholic Liquors from fermented materials or in the separation of two or more liquids having different boiling points as in the separation of gasoline Carrison and lubricating oil from crude oil
Answer: It is used to separate a solvent from a solute.
Explanation:
9. Which of Earth’s sphere consists of all living things? A. hydrosphere B. geosphere C. biosphere
Answer:
i think its b
Explanation:
i took it
C3H4(g) + xO2(g) → 3C02(g) + 2H2O(g)
-
What is the value of the coefficient x in this
equation?
Answer:
4
Explanation:
atoms of O2 in the product side:
(3×2)+(2×1)=8
so to balance it:
x × 2 =8
x=4
Help this is so confusing like
Answer: which of the following is qualitative?
A. 100-calorie apple
B. 1-liter soda
C. triangular crystal
D. 10-inch brick
answer is D
Explanation:
How does the microscopic arrangement of particles affect the microscopic behavior of the solution?
Answer:
In a solid, the particles pack together as tightly as possible in a neat and ordered arrangement. ... With an increase in temperature, the particles gain kinetic energy and vibrate faster and more strongly. The attractive force in solids need not be stronger than in liquids or gases
which of the following elements forms coloured compounds. A. Normal B. Transition C. Lanthanicles D. Inner transition
Answer:
B. Transition
Explanation:
Transition elements form coloured compounds because they have unfilled d orbitals.
Can someone help me with this chemistry question?
Answer:
B no. is the answer because
Explanation:
acids increase the hydrogen ion concentration, which provides more ionsan acid comes in contact with a metal, the acid steals free electrons away. That loosens the bonds holding metal atoms in place, so the metal dissolves. That's a chemical change, so the ability of acids to dissolve metals is a chemical propertyWhen a strong acid is neutralized by a strong base there are no excess hydrogen ions left in the solution. The solution is said to be neutral as it is neither acidic nor alkaline. The pH of such a solution is close to a value of 7; the exact pH value is dependent on the temperature of the solution.So this can probably be the the answer
Hope my answer helps
Mark me Brainliest （⌒▽⌒）#beyourselfAn Oxygen atom Isotope has an overall charge of -1. How many electrons does it have?
Answer:
8 electrons.
Explanation:
"Solution is a homogeneous mixture" explain
Answer:
solution is equal distribution of a solute and liquid
Explanation:
for example water and sugar make a solution
Solutions with a uniform composition are homogeneous solutions. A homogeneous solution, then, has an equal concentration of the constituent substances throughout the entire solution.
Similar to how water molecules are evenly distributed among the Na+ and Cl- ions when sodium chloride dissolves in it. The mixture's composition is constant throughout, and it is difficult to separate the components from one another. Solutions are homogeneous mixtures, which can contain substances in either state (solid, liquid, or gas).
Even if the components were evenly dispersed, they could still be separated at some point in a homogeneous mixture. The components may need to be separated using a procedure like evaporation, distillation, or chromatography, but this is still possible.
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what do you do if you add a bit too much solvent when filling the volumetric flask to the mark
If excess solvent is added, discard the entire solution and begin the process of preparing the solution afresh.
It is common to prepare solutions using a standard volumetric flask. In this method, the required amount of solid or liquid is added to the volumetric flask and made up to mark with solvent.
Sometimes, it is possible to mistakenly exceed the mark as the solvent is added. In such cases, you must discard the entire solution and begin the process of preparing the solution afresh.
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AgNO3(aq) + NaCl (aq) —> AgCl (s) + NaNO3 (aq)
The equation represents a __ reaction.
A. synthesis
B. decomposition
C. neutralization
D. double replacement
Answer:
D
Explanation:
double replacement
the reactants decompose to form new substances by exchange of radicals
How do the atoms aluminum and fluorine react to form the compound aluminum fluoride?
Answer:
Aluminum fluoride is an ionic compound. Meaning that the two elements form a ionic bond. In ionic bonding, atoms receive and donate electrons in order to become stable. In this case, aluminum donates its three outer electrons to three fluorine atoms. Aluminum forms a triple positive aluminium ion (Becomes a cation) and fluorine forms three single negative fluoride ions (Becomes a anion).
Aluminum (3+)Fluorine (1-)if 15 grams of carbon is present at the beginning of a reaction,how many grams of carbon will be present in the products?
The law of conservation states that the mass of the element remains the same during the course of the reaction.
The law of reaction conformed by the following:-
Mass of reactantMass of productAccording to the question, the amount of carbon is 15g in the reactant and the amount will remain same at the end of reaction, which is product that is 15g.
Hence, the amount remain same in the reaction that is 15g.
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3. What type of gas do plants take in?
oxygen
carbon dioxide
Answer:
Archaeology is the study of the human past using material remains. These remains can be any objects that people created, modified, or used.
Explanation:
Which of the following best describes the relationship between a
mutation and a resulting change in the coat color of a mouse?
Answer:
A I think
Explanation:
An atom, X, contains 16 protons.
Which statement about Z is correct?Explain why.
A) It cannot form an ion.
B) It contains 6 electrons in the outer shell.
C) It contains 6 neutrons.
D) It had relative atomic mass of 16.
Answer:
B
Explanation: as protons no. = electrons no.= atomic number(Z)
oncepts
4 List What are some of the physical properties
of stars?
Answer:
Brightness. Two characteristics define brightness: luminosity and magnitude. ...
Color. A star's color depends on its surface temperature. ...
Surface Temperature. ...
Size. ...
Mass.
Explanation:
there
How much heat is required for 10 g of steam specific heat
capacity = 2.01 J/gºC) at 120°C to be heated to 160°C?
Answer:
145°C is allowed
Explanation:
step step by step explanation
Rock candy is composed of large sugar crystals, which are made of sugar molecules. Growing the crystals in water with food dyes makes colored crystals. A friend has a plan to make jewelry using rock candy and claims that the jewelry will look like and last as long as jewelry made from gemstones. Use evidence about the bonding in ionic and molecular compounds to evaluate this claim.
It is possible to form jewelry from rock candy that will look like and last as long as jewelry made from gemstones since the both materials contains a crystalline lattice.
Ionic bonding comprises of units cells of oppositely charged ions that come together to form a crystal lattice. Molecular compounds such as gemstones are also composed of unit cells which also give a well defined crystal lattice.
We must note that the strength of these materials come from the fact that all have a well defined crystal lattice in which particles are well ordered. It is possible to form jewelry from rock candy that will look like and last as long as jewelry made from gemstones since the both materials contains a crystalline lattice.
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