I need help with a questino

Describe the forces both attractive and repulsive that occur as two atoms move closer together.

The chemical formula for emerald is be3al2(sio3)6.an emerald can be decided as

Asolution is made by dissolving 2.3 moles of sodium chloride (nacl) in 0.155 kilograms of water. if the molal boiling point constant for water (kb) is 0.51 °c/m, what would be the boiling point of this solution? show all the steps taken to solve this problem.