An element A on combining with O 2 produces an oxide A 2 O which is basic in nature. a. How many electrons must be there in the outermost shell of the element A? b. To which group of periodic table it belongs? c. Identify whether it is a metal or non-metal.

Question

Philoid · Accepted Answer

(a) O₈ = 2, 6

Since valency of oxygen is 2 and element A produces oxide A₂O (i.e two atoms of element A and one atom O are present in A₂O molecule) so 1 electron must be present in the outermost shell of element A.

(b) Since element A contain 1 electron in outermost shell so it belongs to 1 group.

(c)Since it has 1 electron in outermost shell so it will donate this electron to acquire noble gas electronic configuration. Hence it is metal.

An element A on combining with O2 produces an oxide A2O which is basic in nature.a. How many electrons must be there in the outermost shell of the element A?b. To which group of periodic table it belongs?c. Identify whether it is a metal or non-metal.

An element A on combining with O₂ produces an oxide A₂O which is basic in nature.
a. How many electrons must be there in the outermost shell of the element A?

b. To which group of periodic table it belongs?

c. Identify whether it is a metal or non-metal.