describe the attractive and repulsive forces that occur as two atoms are brought together?

Answer 1

The electrons on that are on the outside of the atoms repel each other. But if one atom has one too many electrons and the other has too few (as with an salt such as sodium chloride) the atoms attract each other.

The electrons on the outside of the atoms, even though they repel each other, can form molecular bonds with electrons from another atom.

The above are all simple explanations. You will have to read your book to know the details to best answer this question.

Answer 2

Hmmm... why not look in your textbook. Do your own homework!