Definitions of Relative Atomic Mass, Isotope, Atomic No.
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Atomic Number / Proton Number

Number of protons in the nucleus

Mass Number / Nucleon Number

Total number of protons and neutrons in the nucleus

Isotope

Atoms with the same atomic number but different number of neutrons therefore a different atomic mass.

Nuclides

A specific nucleus eg Cl - 35 and Cl - 37 Relative atomic mass: The mass of an atom to 1/12 of the mass of a carbon-12 atom.

Other Notes in this Category

1. Acids and Bases
2. Aqueous Chemistry
3. Chlorine
4. Definitions of Element, Mixture and Compound
5. Definitions of Relative Atomic Mass, Isotope, Atomic No.
6. Forumlae for Nuffield Physics
7. Radiation: properties of different types of radiation

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