The atoms form positive and negative ions which attract to each other. Ionic compounds are composed of large numbers of positive ions (cations) and negative ions (anions) so that the amount of positive charge equals the negative charge. In covalent bonds the electrons are shared between two bonded atoms.
4. Try doing a gradation of color by selecting a shirt and tie that are the same color, but in lighter or darker shades. For example, pair a light blue dress shirt with a medium blue tie. 5. For business interviews and important meetings, keep your tie color classic and conservative.
Matching your Red Tie. When matching your red necktie to your dress shirt it is important to keep the focus on the tie so as not to become too busy or overwhelming. Your best choice is going to be a plain white shirt, which goes with everything but gives red an especially bright background to pop against.