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Key Definitions
Chemistry Stuff
Term | Definition |
---|---|
Isotopes | Atoms of the same element with a different number of neutrons. |
Atomic Number | Number of protons in the nucleus of an atom. |
Mass Number | Total number of protons and neutrons. |
Ion | Positively or negatively charge atom or group of atoms. |
Relative Isotopic Mass | Mass of an atom of an isotope compared with 1/12 of the mass of a carbon-12 atom. |
Relative Atomic Mass | Mean weighted mass of an atom of an element compared to 1/12 the mass of a carbon-12 atom. |
Avogardo Constant | Number of atoms per mole of the carbon-12 isotope (6.02 x 10^23 mol) |
Mole | Amount of any substance containing the same amount of particles as 12g of the carbon-12 isotope. |
Molar Mass | Mass of a substance per mole of a substance (measured in g mol^-1) |
Empirical Forrmula | The simplest whole number ratio of atoms of each element in a compound. |
Water Of Crystalisation | .XH2O |