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13 Cards in this Set

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Element
A substance that cannot be split into simpler substances by chemical means
Atom
The smallest amount of any element which can exist
Ion
atom that has gained an electrical charge
Molecule
A group of atoms linked together in a particular arrangement, always bonded covalently
Polar molecule
Molecule with a charged region, e.g. water :

H slightly +, O slightly -,
0
H H

(hollow quaver) = delta = slightly
Compound
Combination of different elements formed during chemical bonding, either ionic or covalent.
Organic compound
Any compound that contains a carbon atom (water and salts are inorganic compounds).
Valency
The number of bonds an element usually forms
Covalent bond
A strong bond formed when electrons are shared between atoms.
Hydrogen bond
the slightly positive H of one molecule is attracted to the slightly negative area of ANOTHER molecule.
Isomer
Compound with the same chemical formula but a different structure.
Condensation Reaction
A reaction involving the loss of water.
Hydrolysis
The breakdown of a single compound by the addition of water.