N5 Chemistry - Atom and Periodic Table

Select the TWO subatomic particles that are found in the NUCLEUS of an atom.

• protons

• electrons

• neutrons

The subatomic particles with a negative charge are:

• protons

• electrons

• neutrons

A neutron has a charge of

• +2
• No charge
• -1
• +1

Select ALL the particles that give atoms their mass.

• protons

• neutrons

• electrons

The atomic number tells you what?

• number of electrons

• number of protons

• sum of protons and electrons

• sum of protons and neutrons

Why are atoms neutral?

• same number of protons and electrons

• same number of protons and neutrons

• same number of neutrons and electrons

• same number of protons, neutrons and electrons

Why do ions form?

• to maximise the number of electrons

• to have a full outer shell of electrons

• to minimise mass

• to become less reactive

If an ion has 8 protons, 8 neutrons, and 10 electrons, what type of charge does the ion have?

• +2

• -2

• 0

The first energy level can hold up to how many electrons?

• 2

• 8

• 10

• 12

The second energy level can hold up to how many electrons?

• 2
• 8
• 10
• 12