(a) Element ‘X’ has atomic number 11.
(b) Element ‘Y’ has atomic number 16.
Ans. (a) Element X
is a metal. Its electronic configuration is (2, 8, 1). The element has a
tendency to loose one electron making it metallic in nature.
(b)
Element Y is a non-metal. Its configuration is (2, 8, 6). Therefore there is a
tendency to accept the electrons rather than to loose, making it non-metallic
in nature.
