Assertion:- In MgO electrovalency of Mg is 2.
Reason :- Mg shares two electrons with oxygen.

Assertion : In the formation of water octet molecule, both hydrogen and oxygen atoms attain octet of electrons. Reason : Oxygen atom forms two ionic or electrovalent bonds with two hydrogen atoms.

Assertion : In the formation of water molecule, both hydrogen and oxygen atoms attain octet of electrons. Reason : Oxygen atom forms two ionic or electrovalent bonds with two hydrogen atoms.

In the following question, an Assertion (A) is followed by a corresponding Reason (R). Use the following keys to choose the appropriate answer. Assertion : In the formation of water molecule, both hydrogen and oxygen atoms attain octet of electrons. Reason : Oxygen atom forms two ionic or electrovalent bonds with two hydrogen atoms.

Atomic number of Mg is 12, give the number of electrons it Mg^(2+) ion.

Assertion: Mg gets oxidised when heated in CO_(2) atmosphere. Reason: Mg has a strongly affinity for oxygen.

Assertion: Mg can burn in the atmosphere of N_(2) . Reason: Mg reacts with N_(2) to form nitride.

Assertion: Mg can bum in the atmosphere of N_(2) . Reason: Mg reacts with N_(2) to form nitride.