(ii) Mention one unique feature each of elements Y and,Z. (iii) Which of the above two elements belong to the same ****** ?

Question

Three elements X, Y and Z have atomic numbers 7, 10 and.14 respectively.

(i) Identify the group number of these elements in the periodic table.

(ii) Mention one unique feature each of elements Y and,Z.

(iii) Which of the above two elements belong to the same ** ?

Answer 1

(i) X-2,5: Group 15

Y-2,8: Group 18

Z-2, 8,4: Group 14

(ii) Y is a noble gas which is unreactive and has a complete outermost shell.

Z is metalloid and possesses semi-metal, properties of both metals and non-metals.

(iii) X and V belong to the same ** i.e., 2nd **.