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Define an element?
Describe the structure of an element.
Define the turm compound.
Carbon + oxygen ------
Two oxygens molecules are red.
One carbon molecule is black.
How would you draw this?
Ca(+2), NO (-3) What is the chemical formula of calcium nitrate?
Relative atomic mass (Mr values) Percentage mass of an element in a compound
Mr values of MgCl (2)
Numbers have to be in subscript
