Bond Notes

Ionic Bond * bond formed between oppositely charged ions because of electrostatic forces of attraction. *<Tab/>example: sodium + chlorine ----> sodium chloride Ionic compound * a compound composed of ions. * Metal atoms lose electrons to form positive ions, called cations, which are smaller than the original atom. The loss of an energy level with electrons, plus the excess positive charge draws the remaining electrons toward the nucleus and causes the electron …

…for compounds to be electrically neutral, the sum of the charges on the cation and anion in the formula must add up to zero. Problems Writing Empirical Formulas Write the empirical formula for the following molecules: (a) glucose (C6H12O6), (b) water (H2O), (c) caffeine (C8H10N4O2), and (d) hydrogen peroxide (H2O2). Writing Chemical Formulas Write the chemical formula for: (a) sodium chloride, (b) lithium oxide, and (c) aluminum oxide.