Structure of the nucleus

1

What is the relative mass of the proton?

2

What is the relative charge of a neutron?

3

Uranium-235 has 92 protons. How many neutrons does it have?

4

What is an isotope?

5

Nitrogen-14 has 7 protons. How many neutrons does it have?

6

The mass number of an element is...

7

The atomic number of an element is …

8

What is the number of protons in the nucleus equal to?

9

What has an ionised atom lost or gained?

10

Why is deuterium _{1}^{2}\textrm{H} sometimes called heavy hydrogen?