Question

an element X belongs to second group and third period of periodic table reacts with another element by 15th group and second period
(a)identify X and Y
(b)write its electronic configuration
(c) write their valency
(d)what are the specialities of X and Y
(e) what kind of compound will be formed.write the formula also.​

Answer 1

Answer:

1) Mg and N

2) (Ne) 3s2, (He) 2s2 2p3

3) 2,3

4)11th most abundant metal, It is a colourless and odourless gas

5) Mg3N2 which is an ionic compound

Answer 2

(a) The elements are Magnesium and Phosphorus.

(b) Magnesium: 2,8,2 and Phosphorus: 2,8,5

(c) Magnesium: 2 and Phosphorus: 3

(d) Magnesium: It's the 3rd most commonly used structural metal. Phosphorus: It's a vital plant nutrient.