Question

The number of electrons lost or gained by an atom refers to-

• A. Electrovalency
• B. Covalency
• C. Donation
• D. Acceptance

Answer 1

The correct option is A

Electrovalency

Explanation for Correct option (a) :

• Electro-valency is defined as the number of electrons lost or gained by an atom to form an ionic bond.
• Elements that are capable to lose electrons show positive electro-valency.
• Elements that are capable to gain electrons show negative electro-valency.
• For Example- To form a bond between Mg and O in the formation of compound MgO, Mg is capable to lose 2 electrons and O is capable to gain 2 electrons to form an ionic bond. Hence, electro-valency of Mg is +2 and electro-valency of O is -2.

Explanation for Incorrect option (b):

Covalency is defined as the number of electrons shared by atoms to form a covalent bond.

Explanation for incorrect option (c):

Donation is simply the lose of electrons.

Explanation for incorrect option (d):

Acceptance is simply the gain of electrons.