Question

Four elements A,B,C &D with atomic numbers 14,19,12,9 respectively,

Give the position of four elements A, B, C and D in the Periodic Table in terms of group and period.
(b) classify the elements into metals,non metals and metalloids
         (c) State whether C is more reactive or less reactive than A.
         (d) write increasing order of atomic size
         (e) Which type of ion, cation or anion, will be formed by element B,C,D?
(f) write general electronic configuration of s,p,d and f block elements​

Answer 1

Answer:

(a)14,grp no.-14 and p no.-2..19,grp no.-1 and p no.-4..12,grp no.-2and p no.-3..9,grp no.-17and p no.-2

Explanation:

(b)Metals-19,12;non-metals-9;metalloids-14

(c)more reactive

(d)9,12,14,19

(e)b will form cation,c will formcation and d will form anion

(f)14-1s2 2s2 2p6 3s2 3p2

19-1s2 2s2 2p6 3s2 3p6 4s1

12-1s2 2s2 2p6 3s2

9-1s2 2s2 2p5