Question

As we move down a group in periodic table how does the following change:
(1) Atomic size
(2) Valency
(3) Electro negativity.​

Answer 1

atomic size increases

valency remains same

electro negativity increases

Answer 2

Atomic size increases due to addition of shells

Valency remains same as electro-valent electrons remain same in outer shell

And,

Electronegativity or ability to gain electrons decreases