Atoms - Edexcel

1

What is the relative mass of the proton?

2

What is the relative charge on the neutron?

3

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

4

What is an isotope?

5

What did Ernest Rutherford direct at a thin gold leaf in 1905?

6

What is the mass number of an element?

7

What did Niels Bohr add to the Rutherford atomic model?

8

What has an ionised atom lost or gained?

9

What has changed in the structure of the Cu2+ ion?

10

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