Atomic Structure

1

What is the relative mass of an electron?

2

The number of protons (p), electrons (e) and neutrons (n) in an atom of 23Na is:

3

The number of electrons in the nitride ion N3- is:

4

The electronic configuration for a calcium atom 40Ca is:

5

The relative charge on a neutron is:

6

Which of the following statements is true about two isotopes of an element?

7

What is the relative atomic mass of chlorine if there is 75% of 35Cl and 25% of 37Cl?

8

Which of the following statements is true about a compound?

9

The number of electrons in a potassium ion K+ is: