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.
Not every dress code is strictly black tie. For black tie optional events, men can choose to wear a dark suit, white dress shirt and conservative tie, such as a classic striped pattern. Leather dress shoes complete the look. Women can wear floor-length gowns or cocktail dresses, but dressy separates will do, too.