Hello anyone here from India​

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

Agas in a balloon at constant pressure has a volume of 160 ml at -125*c. what is its volume at 29.0*c?

Which of the following are sources of revenue for media companies? a. direct sales to producers b. advertising and subscriptions c. online purchase d. capital investments