Question

write the name and symbol of the element from the description

the atom having the smallest size
​

Answer 1

$\large\bold{\underline{Hydrogen}}$

Answer 2

Answer:

Helium

• Symbol - He

Helium is the atom having the smallest size.

The atomic radius gets smaller because the electron orbit fills up to form an octet and for each of the additional electron, a proton is added to the nucleus, pulling all the electron shells closer around the nucleus.