What is the osmotic pressure in atm of a 0.90 M salt solution at 20.0°C?
Assume R = 0.08206 L• atm /mol K

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

i don,t know so just answer mine