In a hypothetical nuclear fusion reactor, the fuel is deuterium gas at a temperature of about 9.5 x 108 k. if this gas could be used to operate a carnot engine with tl = 864°c, what would be the engine's efficiency?

Elements in group viiia (also known as group 18, or the noble gases) have similar properties because they all have a. the same number of electron shells b. full octets c. the same number of valence electrons d. the same number of electrons needed to fill their octet