Chem

Question 1

Write the chemical formula for Na+ with Cl-.

Answer 1

NaCl

Question 2

What is the name of this compound?

Fe2S3

Answer 2

Iron Sulfide.

Question 3

What is the electron configuration for Calcium?

Answer 3

2,8,8,2

Question 4

Calculate the correct number and symbol for this equation to be correct.

___ 210 0
Pb –> Bi + B
82. ____ -1

Answer 4

210 210 0
Pb –> Bi + B
82. 84 -1

Question 5

What is a cation?

Answer 5

A positively charged ion.

Question 6

What is an anion?

Answer 6

A negatively charged ion.

Question 7

What are the three types of nuclear decay?

Answer 7

Beta, alpha and gamma.

Question 8

What is an element?

Answer 8

A substance made up of only one type of atom.

Question 9

What is a compound?

Answer 9

A compound is a substance made up of many types of atoms.

Question 10

What three things are inside an atom?

Answer 10

Electrons,neutrons, protons

Question 11

If the mass number of an element is 24 and it has an atomic number of 10, how many neutrons does it have?

Answer 11

14

Question 12

What is an isotope?

Answer 12

An isotope is an element that has the same mount of protons but different amount of neutrons.

Question 13

What is transmutation?

Answer 13

Transmutation is when an element changes from one to another whilst undergoing nuclear decay.

Question 14

What is a radioisotope?

Answer 14

A radioactive isotope.

Question 15

Essentially what is a alpha particle?

Answer 15

A helium particle.

Question 16

A beta particle when it undergoes nuclear decay does what?

Answer 16

A neutron is converted into an electron.

Question 17

What is a half life?

Answer 17

It is half the time it takes for an element to decay.

Question 18

What happens in a fission reaction?

Answer 18

A large nuclei splits into two almost equal pieces.

Question 19

What happens in a fusion reaction?

Answer 19

Two small nuclei come together to form one.

Question 20

What is the valence for boron?

Answer 20

+3