A gas is confined in a steel tank with a volume of 2.25 L. At 289.32 K, the gas exerts a pressure of 6.02 atm. After heating the tank, the pressure of the
gas increases to 8.25 atm. What is the temperature of the heated gas in
degrees C?

Self-ionizes to form an equilibruium system in which [ h_{3} o^{+} ]=[ oh^{-} ]=10^{-7} m

Well you can immediately rule out a and d because if a metal were to lose or gain protons, then it would become a different element all together. the answer here is b because the positive symbol with a number refers to how many electrons the metal can give away to become stable.

Theyre semiconductors.