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Atomic Structure

Below are more examples of balanced equations showing state symbols.

sodium + oxygen  arrow sodium oxide.
 4Na(s)  +    O2(g)   arrow           2Na2O(s)

aluminium + chlorine  arrow aluminium chloride.
 2Al(s)  +    3Cl2(g)   arrow           2AlCl3(s)

aluminium + oxygen  arrow aluminium oxide.
 4Al(s)  +    3O2(g)   arrow           2Al2O3(s)

calcium + chlorine  arrow   calcium chloride.
 Ca(s)  +    Cl2(g)   arrow           CaCl2(s)

magnesium + bromine  arrow   magnesium bromide.
 Mg(s)  +    Br2(g)        arrow           MgBr2(s)

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