chemistry - key concepts in chemistry: covalent bonding (1.28 - 1.31)

1.28 how are covalent bonds formed?

pairs of electrons shared between 2 non-metal atoms

strong covalent bond - strong electrostatic forces of attraction between bonded atoms

weak intermolecular forces - weak forces of attraction between molecules

1.29 what does covalent bonding form?

molecules

1.30 typical size of atoms & small molecules

diameter ≈ 10^-10m

1.31 simple molecular, covalent substances dot & cross diagrams - hydrogen

1.31 simple molecular, covalent substances dot & cross diagrams - hydrogen chloride

1.31 simple molecular, covalent substances dot & cross diagrams - water

1.31 simple molecular, covalent substances dot & cross diagrams - methane

1.31 simple molecular, covalent substances dot & cross diagrams - oxygen

1.31 simple molecular, covalent substances dot & cross diagrams - carbon dioxide