Question Bank for Grade 9 Chemistry

The three subatomic particles are

99.9% of the atom's mass is found where?

Electrons are

Protons are

When an atom contains more electrons than protons, it is

When an atom contains more neutrons than another atom with the same number of protons, it is

The nucleus is ____________ charged.

The area around the nucleus of an atom where the atom's electrons are most likely to be found is called

If a carbon atom has six protons and has a mass of 13 amu, how many neutrons are in that carbon atom?

If a neutral atom has 8 protons, how many electrons does it have?