Question

the three element X,Y,Z having atomic no. 11,12,13
(a) arrange them in increasing order of Atomic size
(b) arrange them in increasing order of ionization of energy.
(c) write demerits of modern periodic table.​

Answer 1

Answer:

Ans a: z<y<x

Ans b:x<z<y

Ansc:

1. not fixed position of hydrogen
2. not position for f block element. they are kept separate
3. not valid for atomic no. greater than 118