Year 9 Chemistry Revision

What is an atom?

• The largest unit of matter.

• The smallest unit of matter.

• A banana

What is found in the nucleus of an atom?

• Protons

• Electrons

• Protons and Electrons

• Protons and Neutrons

What charge does an electron have?

• Positive

• Neutral

• Negative

A neutron has what charge?

• Positive

• Neutral

• Negative

What is an atomic number?

• Number of electrons an atom has

• Number of neutrons an atom has

• Number of protons an atom has

What is an atomic mass?

• The total number of electrons in an atom

• The total number of neutrons in an atom

• The total number of protons and electrons in an atom

• The total number of protons and neutrons in an atom

What element has only one electron?

• Helium

• Carbon

• Lithium

• Hydrogen

What is group 18 on the periodic tabled called?

• Alkali metals

• Noble gases

• Halogens

• Alkaline earth metals

Which part of the atom determines its identity?

• Protons

• Neutrons

• Electrons

• Valence Electrons

What charge does a proton have?

• Negative
• Positive
• Neutral