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

Where are protons found in an atom?

Answer 7

In the nucleus

Question 8

Where are neutrons found in an atom?

Answer 8

In the nucleus

Question 9

Where are electrons found in an atom?

Answer 9

Energy levels or electron shells

Question 10

What is the Atomic number?

Answer 10

The number of protons

Question 11

What is the Mass number?

Answer 11

The total number of protons and neutrons

Question 12

What is an isotope?

Answer 12

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

Question 13

What is RAM?

Answer 13

Relative Atomic Mass of an atom is the average mass of an atom of an element, taking into account the different masses of each isotope

Question 14

How is RAM calculated?

Answer 14

Using the mass number of each isotope and their % abundance in nature.
For example - chlorine has two isotopes:
Isotope Mass %abundance
Chlorine-35 35 75
Chlorine-37 37 25
So: RAM = ((75/100) x35) + ((25/100) x37) = 35.5