The two different bits that make up the nucleus are

The bits in the nucleus that have mass but no charge are

If an atom has the same number of protons and electrons then it will have no overall charge, but if it loses an electron from its outer shell it will then be

Hydrogen is 1 on the periodic table, Helium is 2 and 3 is

Nitrogen is 7 on the periodic table but its mass is 14, this means it has

Who could be referred to as Potassium Argon?

Where are you if you have some potassium, sulphur, hydrogen and some more sulphur?

Add the atomic numbers for Sodium, Tungsten, Iron and neon.

Which of the following is the heaviest atom?

An atom of sodium and an atom of chlorine combine to make a molecule of salt (NaCl). What would a molecule of salt weigh?

What is the number of the element named after the nearest planet to the Sun?

Which element does Superman dislike?