Question

An element m burns in oxygen to form an ionic compound mo. Write the formula of the compounds formed if this element is made to combine with chlorine and sulphur separately.

Answer 1

Oxygen in ionic form is as oxide O2-.

So if element M forms MO, it means M in ionic form is M2+.

For reaction with chlorine, Cl in ionic form is Cl-.

So compound is MCl2

For reaction with sulphur, S in ionic form is S2-.

So compound is MS.

Answer 2

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