3.2.1 - Particle Numbers

Question 1

What is the relative mass of a proton?

Answer 1

1

Question 2

What is the relative mass of a neutron?

Answer 2

1

Question 3

What is the relative mass of an electron?

Answer 3

0.0005

Question 4

What is the relative charge of a proton?

Answer 4

+1

Question 5

What is the relative charge of a neutron?

Answer 5

0

Question 6

What is the relative charge of an electron?

Answer 6

-1

Question 7

What is the atomic number?

Answer 7

The number of protons

Question 8

What is the mass number?

Answer 8

The total number of protons and neutrons

Question 9

What are isotopes?

Answer 9

Atoms with the same number of protons but different numbers of neutrons

Question 10

What is Relative Atomic Mass (RAM)

Answer 10

The average mass of an atom

Question 11

How is the Relative Atomic Mass (RAM) calculated?

Answer 11

RAM = (% x mass) + (% x mass)

Question 12

Chlorine has 2 isotopes: Chlorine- 35 & chlorine- 37
Chlorine- 35: mass no. 35, abundance 75%
Chlorine- 37: mass no. 37, abundance 25%

Calculate the RAM for chlorine.

Answer 12

RAM = (75/100 x 35) + (25/100 x 37) = 35.5