Bromine forms covalent bonds because it has seven valence electrons, but neon has eight valence electrons and already fulfills the octet rule. The compound cyanogen (CN)2 has covalent bonds shown in this diagram.
Electrons and protons, but not neutrons.
D = m / V
1.025 = m / 100,000 mL
m = 1.025 x 100,000
m = 102,500 g
Matter either loses or absorbs energy when it changes from one state to another.
Yes. If this is the balanced equation:
AlCl3 + 3Na —— 3NaCl + Al
then Al was reduced from a 3+ oxidation (to neutralize the 3- from the chlorine) to a 0 oxidation (elemental ground state).
