When two hydrogen atoms get close enough, the electron from each atom feels an attraction from the proton in the other atom's nucleus. This attraction pulls the atoms together. The electrons end up ...

A covalent bond happens when the positive nuclei from two different atoms are held together by their common attraction for the shared pair of electrons held between them. Covalent bonds are strong ...

The positive and negative ions attract each other and form the ionic compound sodium chloride. One calcium and two chlorine atoms are near each other. An electron from each atom feels the attraction ...