1.46: Understand How to Use Dot-and-Cross Diagrams to Represent Covalent Bonds in: Diatomic molecules, Including Hydrogen, Oxygen, Nitrogen, Halogens and Hydrogen Halides ; Inorganic Molecules Including Water, Ammonia and Carbon Dioxide ; Organic Molecules Containing Up to Two Carbon Atoms, Including Methane, Ethane, Ethene and those Containing Halogen Atoms

COVALENT COMPOUND: Compound involving bonds between Non-Metal and Non-Metal formed by shared pairs of Electrons between the two atoms

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DOT-AND-CROSS DIAGRAMS OF DIATOMIC MOLECULES:

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DIATOMIC MOLECULE	CHARGE
HYDROGEN
OXYGEN
NITROGEN
FLUORINE
CHLORINE
BROMINE
IODINE
ASTATINE

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DOT-AND-CROSS DIAGRAMS OF INORGANIC MOLECULES:

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DIATOMIC MOLECULE	CHARGE
WATER
AMMONIA
CARBON DIOXIDE

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DOT-AND-CROSS DIAGRAMS OF ORGANIC MOLECULES:

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DIATOMIC MOLECULE	CHARGE
METHANE
ETHENE
ETHANE