BASICS

• What is the relative mass of a proton?

  1
• What is the relative charge of a proton?

  +1
• What is the relative mass of a neutron?

  1
• What is the relative charge of a neutron?

  0
• What is the relative mass of an electron?

  0.0005
• What is the relative charge of an electron?

  -1
• All atoms of the same element have the same number of?

  protons
• What are isotopes?

  atoms Of the same element, but with different masses, which have the same number of protons but different number of neutrons
• What is the atomic number?

  Number of protons
• What is the mass number?

  Number of protons and neutrons