Relative charge of a neutron

• +1
• 1
• -1

• 0

Relative charge of a proton

• 1
• +1
• -1

• 0

Relative charge of an electron

• -1

• 1
• +1
• 1

Relative mass of a neutron

• 1

• Approx. 0
• -1

• +1

Relative mass of a proton

• 1

• Approx. 0
• -1

• +1

Relative mass of an electron

• Approx. 0
• 1

• -1

• +1

Location of neutrons in an atom

• Nucleus
• Orbitals (shells)
• Throughout the atom

Location of protons in an atom

• Nucleus
• Orbitals (shells)
• Throughout the atom

Location of electrons in an atom

• Orbitals (shells)
• Nucleus
• Throughout the atom

Mass number is the number of...

• protons and neutrons
• protons only
• neutrons only