Atomic Structure

Atomic Structure

1. Atomic number

   • The number of protons in its nucleus

2. Mass number

   • The number of protons plus neutrons in its nucleus. Also known nucleon number

3. Isotope

   • Atoms of the same element which have the same number of protons but a different number of neutrons

4. Relative isotopic mass

   • The mass of one atom of an isotope relative to 1/12 of the mass of an atom of the isotope carbon-12 - values are relative so do not have units

5. Relative atomic mass

   • The average mass of an atom of an element relative to 1/12 of the mass of an atom of the isotope carbon-12 - values are relative so have no units

6. Mass spectrometry

   • physicsandmathstutor.com

7. First ionisation energy

   • The energy required to remove one mole of electrons from one mole of gaseous atoms

8. Successive ionisation energies

   • The next ionisation energies after you have removed the first electron. The energy involved in the removal an electron successively from an atom is called the successive ionisation energy.

Images and files in the map