Answer:
D
Explanation:
NO and O2 are both colourless gas. and its product is brown. thus when a brown gas is produced, you can say that NO and O2 reacted to form NO2
<span>Rules for the Principal Energy Level. A principal energy level may contain up to 2n2 electrons, with n being the number of each level. The set of three p orbitals can hold up to 6 electrons. Thus, the second principal energy level can hold up to 8 electrons, 2 in the s orbital and 6 in the p orbital.</span>
Hydronium ions are H30+, and pH = -log10[H+]
<span>As H+ ions in solution exist as H3O+ ions, the lower the pH, the higher the concentration of H30+</span>
A Mg2+ ion would have 10 electrons because it lost 2 to meet the octet rule when it reacted.
