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Give the formulae of the stable binary c...

Give the formulae of the stable binary compounds that would be formed by the combination of following pairs of elements.
(a) Ca and `N_(2)` (b) Li and `O_(2)` (c ) Ca and `Cl_(2)` (d) K and `O_(2)`

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(a) Calcium nitride `(Ca_(3)N_(2))` (b) Lithium oxide `(Li_(2)O)`
(c ) Calcium chloride `(CaCl_(2))` (d) Potassium oxide `(K_(2)O)`.
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