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.
3 of 9. Black Tie Optional. For a black tie optional event, guests can always wear the same attire as for a black tie event. For guests who want to go a bit more casual, gentleman can wear a dark suit with a white shirt and conservative tie.