Question

the position of four elements A B C and D in the modern periodic table shown arrange the elements in increasing order of atomic size​

Answer 1

Answer:

d<c<b<A

Explanation:

element a is in fifth shell means it has 5 shells

where as element b and  c  are in third shell means 3 shell and element d is in second shell means 2 shell .

"atomic size is directly propotional to shell number".