How small is an ATOM #Shorts

How many small squares are there in 1sq.cm?

How many small squares are there in 1sq.cm?

How is the small intestine designed to absorb digested food?

Atom A has a mass number 209 and atomic number 82 Atomic B has a mass number 209 and atomic number 83 (i) How many protons atom A has ? (ii) How many protons atom B has ? (iii) Are atoms A and B isotope of the same element ?