Question

21. An element A belongs to the third period and 19 group of the periodic table, then find out
whether A is metal or Non-metal.
22. Discuss how size of elements varies when we move from up to down within a group ?​

Answer 1

Answer:

first of all 19 group doesn't exist in the periodic table

on moving up to down size of the elements increase

Explanation:

for example lithium size = 152

sodium size = 186