True, buoyancy is the force a fluid exerts upon an object on its surface.
Yes, the crystals will have more time to form and therefore are more likely to be larger compared to one that is cooled quickly.
a) Number of protons = number of electron in the atom = atomic number
So it has 7 protons answer
N-3 has gained 3 electron so number of electrons + 7+3
= 10 answer
