Question

An element'X'belongs to third period and second group of the Modern Periodic Table.
(i) Write its electronic configuration.
(ii) Is it a metal or non- metal ? Why ?
(iii) Write the formula of the compound formed when 'X'reacts with an element.

(a) Y of electronic configuration 2,6
(b) Z with electronic configuration 2,8,7.

Answer 1

(i) Electronic configuration – 2,8,2 
(ii) Metal, as it can easily lose electrons (from outer most orbit) 

(iii)      (a) X    Y                                                                                         (b) X    Z

               2      2                                                                                             2       1

               Compund-XY                                                                                 Compound-xz₂