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.
If you are going to wear a Yellow Tie, make sure you have the personality to carry it off by being outgoing and forthright. Yellow also mixes very well with blues and creates a striking effect in patterns and Stripes. Learn how to match a yellow tie with your shirt and suit.