The electronic configuration of an element is given below. 1s22s22p63s1 which statement about the reactivity of the element is true? a. it is reactive because it has a full outermost energy level. b. it is unreactive because it has a full outermost energy level. c. it is reactive because it has to lose one electron to have a full outermost energy level. d. it is unreactive because it has to gain one electron to have a full outermost energy level.

The combustion of methane, ch4, releases 890.4kj/mol. that is, when one mole of methane is burned,890.4 kj are given off to the surroundings. this meansthat the products have 890.4 kj less than the reactants.thus, ah for the reaction = - 890.4 kj. a negative symbolforah indicates an exothermic reaction.ch (g) + 20 (g)> co2 (g) + 2 h0 (1); ah = - 890.4 kga) how much energy is given off when 2.00 mol of ch,are burned? b) how much energy is released when 22.4g of ch. areburned?