CHEMISTRY HIGH SCHOOL

Atoms gain or lose electrons to increase:a. reactivity
c. stability
b. nucleus size
d. atomic mass

Answers

Answer 1
Answer: Atoms gain or lose electrons toincrease their stability. The answer is letter C. Remember noble gases? Theyfollow the octet rule in which their shells are electrons are filled with eightelectrons. So the atoms that do not belong to the noble gas tend to berestless. They want their electrons to be filled to follow the octet rule. Thatis why they tend to share or gain electrons. Suppose you have a compound ofCCl4. You know that chlorine can only share 1 electron because 7 of itselectrons are filled. Also, in carbon, it can only share 4 electrons because 4of it are already filled. That is why carbon needs four chlorine to form CCl4.

Related Questions

Suppose the gas resulting from the sublimation of 1.00 g carbon dioxide is collected over water at 25.0◦c into a 1.00 l container. What is the total pressure in the container? Express your answer in atmospheres.
Which statement describes the particles of an ideal gas based on the kinetic molecular theory?(1) The gas particles are relatively far apart and have negligible volume.(2) The gas particles are in constant, nonlinear motion.(3) The gas particles have attractive forces between them.(4) The gas particles have collisions without transferring energy.
How much 0.05 M HCl solution can be made by diluting 250 mL of 10 M HCl?
Is solid copper sulphate a conductor or insulator
In a nuclear fusion reaction, the mass of the products is(1) less than the mass of the reactants because someof the mass has been converted to energy (2) less than the mass of the reactants because some of the energy has been converted to mass (3) more than the mass of the reactants because some of the mass has been converted to energy (4) more than the mass of the reactants because some of the energy has been converted to mass

The atomic mass of an element is 32.07 u and its atomic number is 16. The element forms a simple ion. The ion will most likely have a charge of (A) 1–
(B) 2–
(C) 3+
(D) 1+

Answers

Sulfur has mass of 32.07 u and its atomic number is 16. 
Sulfur usually is on -2, +4 or +6 level of oxidation (but it can be also on 5, 3, 2, 1, -1 ).

Out of given choices (B) is the most likely one.

The SI base unit called the mole represents what?

Answers

Answer:

The mole, symbol mol, is the SI unit of amount of substance.

Explanation:

Calculate the mass in grams of 2.56x10 -3 mol of iron.

Answers

Final answer:

The mass in grams of 2.56x10-3 mol of iron is 0.143 g.

Explanation:

To calculate the mass in grams of 2.56x10-3 mol of iron, you need to use the molar mass of iron. The molar mass of iron is 55.845 g/mol. To find the mass in grams, you can use the following step-by-step calculation:

Mass (g) = Number of moles x Molar mass

Mass (g) = 2.56x10-3 mol x 55.845 g/mol = 0.143 g

Learn more about Calculating mass of a substance using moles here:

brainly.com/question/35918100

#SPJ12

An element, X, has 2 isotopes, X-32 with an abundance of 31.5% and X-35 with an abundanceof 68.5%. What is the average atomic mass of element X?

Answers

Answer:

amu = 34.055 or 34.1

Explanation:

to calculate the average mass, first convert the percentages into decimals. Then, calculate the mass numbers. To get this number, multiply the decimal by the mass number for each isotope and, then add them together.

( 0.315 x 32 ) + (0.685 x 35 ) = 34.055

Which is the most important factor in determining the state of a substance?

Answers

Out of the following given choices;

A. the size of the atoms in a substance

B. the number of molecules in a substance

C. the position of the electrons on the outer valence shells

D. the balance between intermolecular forces and kinetic energy

The answer is D. The kinetic energy of the molecules is determines by the temperatures of the substance. The higher the temperatures, the higher the kinetic energy of the molecules. The molecules subsequently move and collide with higher energies and overcome intermolecular forces. This allows the substance to changes state from solid to liquid and eventually to gas (with increasing kinetic energy).

The most important state in determining the state of a substance is temperature. This is because the kinetic energy of a substance's molecules depend on its temperature. For example, an increase in temperature speeds up the movement of molecules. A decrease in temperature slows down the movement of molecules.

This is important because by increasing or decreasing a substance's temperature, you are also adding or removing energy from it. And when a substantial amount of energy has been added or removed, a substance can change its state from solid > liquid > gas or the other way around.

What is the total number of grams of NaI(s)needed to make 1.0 liter of a 0.010 M solution?
(1) 0.015 (3) 1.5
(2) 0.15 (4) 15

Answers

You have to multiply. That is molecules x ram = 0.01 * 150 = 1.5So your answer is 3) 1.5.
Other Questions
A sample of an unknown substance has a mass of 0.158 kg. If 2,510.0 J of heat is required to heat the substance from 32.0°C to 61.0°C, what is the specific heat of the substance?
The reaction between C2H6 and Cl2 is by addition
What tool can be used to measure the volume of a liquid to one decimal place?
The cube has a mass of 72.9 g.What is its density in g/cm3? What substance is it?