2.1, 2.2 and 3.1 - Atomic Structure, Mass Spectrometry, Electronic Configuration + Ionisation Energy

Relative Isotopic Mass

The mass of an isotope of an element relative to 1/12th the mass of a carbon-12 atom.

Relative Atomic Mass

Weighted mean mass of an atom relative to 1/12th of the mass of a carbon-12 atom, taking into account each isotope and its abundance.

The 5 stages of a mass spectrometer

1. Vaporisation

2. Ionisation

3. Acceleration

4. Deflection

5. Detection

The X axis on a mass spectrum

Mass/Charge

Ionisation energy

The energy required to remove 1 mole of electrons from each atom in 1 mole of gaseous atoms of an element to form 1 mole of gaseous mono-positive ions