Question Bank for Grade 9 Chemistry

The three subatomic particles are

• proton, neutron, electron

• proton, nucleus, electron

• protein, neutron, electricity

• proton, neutral, electives

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

• nucleus

• protons

• electron cloud

• neutrons

Electrons are

• negative

• positive

• neutral

Protons are

• negative

• positive

• neutral

When an atom contains more electrons than protons, it is

• a neutral atom with no charge

• an ion and negatively charged

• an ion and positively charged

• an isotope and has more mass

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

• a neutral atom with no charge

• an ion and negatively charged

• an ion and positively charged

• an isotope and has more mass

The nucleus is ____________ charged.

• positively

• negatively

• neutral

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

• electron cloud

• quark

• electron

• nucleus

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

• 5

• 6

• 7

• 8

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

• 7

• 8

• 9

• 10