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Molecular Formula

Write down sy...

Question

Write down symbols or formulae for the following:
(a) an atom of sodium
(b) a molecule of nitrogen
(c) a molecule of oxygen
(d) a molecule of water
(e) a molecule of iron oxide
(f) a molecule of carbon dioxide
(g) a molecule of copper sulphide
(h) a molecule of calcium oxide
(i) a molecule of calcium chloride

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Solution

(a) an atom of sodium: Na
(b) a molecule of nitrogen: N₂
(c) an atom of oxygen: O
(d) a molecule of water: H₂O
(e) a molecule of iron oxide: FeO
(f) a molecule of carbon dioxide: CO₂
(g) a molecule of copper sulphide: CuS
(h) a molecule of calcium oxide: CaO
(i) a molecule of calcium chloride: CaCl₂

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