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Chemistry Key Definitions

Ionisation energy-the energy required to remove an electron for a gaseous atom/mole

Relative atomic mass-Mean Mass of an atom compared with/relative to an atom of Carbon 12

Relative abundance-refers to the abundance of isotopes of a chemical element as naturally found
on a planet used in mass…

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Polar covalent bonding-is when the electrons are uneven shared in-between a bond making the
more electronegative atom delta minus meaning it's partially negative. This causes the dipole-dipole
intermolecular force.

Coordinate bond-or Dative Covalent Bonds are when one atom in the bond has one or more lone
pairs of electrons (so…

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Dipole-dipole forces-there's temporary dipole forces (van der walls) and there's the intermolecular
forces permanent dipole-dipole caused by polar covalent bonds and hydrogen bonds.

Metallic bonding-Metals lose all of their outermost electrons which become delocalised and form
an electron sea, so the variety's of strength in metallic bonding is due to…


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