BRAINCAKECarbon-12
Carbon-12 is used as the standard isotope on which to base all the masses of atoms. A Carbon-12 atom is given a mass of 12u (atomic units) and the mass of all other atoms are compared to it and measured in atomic units.
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Key terms in this lesson
- Isotopes
- Atoms of the same element with the same number of protons but different numbers of neutrons.
- Base
- A proton acceptor.
More in Atoms, Ions and Compounds
- The Nuclear Atom.
- Atomic Number
- Isotopes
- Ions
- Relative Isotopic Mass
- Relative Atomic Mass
- The Mass Spectrometer
- Calculating Relative Atomic Mass
All 17 lessons in Atoms, Ions and Compounds · All OCR AS-level Chemistry topics