How many electrons would an atom need to have before it can begin filling the 3s sublevel.

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

Identify a strong intermolecular force of attraction between an alcohol

Which substance has non polar covalent bonds