Is the electrovalency of metal and non-metal equal in a compound? Give few examples for ionic compounds in which metal and non-metal possess different electrovalencies.

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Solution

Electrovalency of metal and non-metal means tendency to form ionic bonds and it is not same in an electrovalent compound. This is because of the fact that the number of electrons lost by a metal need not be equal to the number of electrons gained by a non-metal in a particular electrovalent compound. For example, in case of magnesium oxide, each magnesium loses two electrons and oxygen gains 2 electrons. Therefore the electrovalency of both metal and non-metal is 2. But, in case of calcium chloride, electrovalency of calcium is 2 and that of chlorine is 1.

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Similar questions

Q. Identify the correct set of electrovalent compounds from the following in which the metal has electrovalency

2

and non-metal has electrovalency

3

(A) Calcium sulphide
(B) Barium nitride
(C) Magnesium phosphide
(D) Aluminium nitride
(E) Magnesium fluoride

Q. Electrovalencies of three metals

A, B, C

are

1, 2, 3

respectively and those of non-metals

X, Y, Z

and

3, 2, 1

respectively. Which among the following couldn't be the formula of the various ionic compounds formed between the respective metals and non-metals?

Q. Identify the ionic compounds in which electrovalency of metal is 3 and that of non-metal is 1.
(A) AlF

_{3}

(B) Al

_{2}

_{3}

_{2}

(D) FeCl

_{3}

(E) Mg

_{3}

_{2}

Q. Electrovalency of non-metal atom is not equal to that of the metal atom in:

Give examples for the following:
(a) Ionic chlorides of two different divalent metals.
(b) Two solid covalent compounds.
(c) Two liquid non-polar compounds.
(d) Two gaseous polar compounds.
(e) Two gaseous non-polar compounds.

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