1.

(a)Give one point of difference betweeen an atoms and an ion. (b)Give one example of each of polyatomic cation and a polyatomic anion. (c )Identify the correct name of FeSO_(3) from the given names-Ferrous sulphate, Ferrous sulphide, Ferrous sulphite. (d)Write the chemical formulae for the chloride the magnesium.

Answer»

Solution :(a)An atom is always NEUTRAL in the SENSE that it does not carry any charge. An ion carries either POSITIVE charge (cations) or negative charge (anion).
(b)Ammonium `(NH_(4))^(-)` ion is a polytomic cation while sulphate `(SO_(4))^(2-)` ion is a polyatomic anion.
(c)Correct CHEMICAL name of `FeSO_(3)` is ferrous sulphite.
(d)Chemical formula for the chloride of magnesium is `MgCl_(2)`.


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