Chemical bonds - Molecular substances

5 important questions on Chemical bonds - Molecular substances

Properties of molecular substances

1. They constist of molecules made up of non-metal atoms
2. They have relatively low melting points
3. They usually don't conduct electricity
4. They form the largest group of the tree types of substance

Atomic bond/ convalent bond

The chemical bonding of a molecule

How do you draw a structural formula

1. Look up the convalencies of the atoms
2. Put the atom with the highest convalency at the centre
3. Draw dashes between the atoms
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When is the Van der Waals force stronger

When the boiling point of a substance is high, and when the mass of the molecules are greater

Which rules apply to molucules with two types of atoms

1. Prefixes derived from classical greek numerals are used to indicate the number of atoms
2. The second type of atom is given the suffix-ide
3. If there is only one atom of the first type of atom, the prefix mono is left out

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