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.
At a black tie fall wedding, men should wear tuxedos and women should wear formal gowns. While you can get away with wearing a dressy cocktail dress, it's better to wear a floor length gown or an evening suit. Black is acceptable, but a jewel tone will feel more festive and fun.