1.4 Elements of Life

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1.4 Elements of Life
Dimitri Mendeleev
Ordered the periodic table by relative atomic mass rather than proton number
Left gaps for elements he predicted would be discovered
Was proved right when germanium was discovered and had all the properties he had predicted

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Isotope Atom with same number of protons but different neutrons
Relative atomic mass Mass of an atom relative to 12 C = 12 exactly
Cation Molecule or atom that has lost 1 or more electrons
Nuclear Fusion 2 nuclei joining to make 1 heavier nucleus
1st Ionisation Enthalpy Energy required to remove 1 mole of electrons from 1 mole of gaseous atoms
Electronegativity The ability of an atom to draw electrons to itself
Ionic bond Electrostatic attraction between a cation and anion
Dative bond Covalent…read more


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