Im taking the quiz now please help! Sodium is an Alkali Metal and has 1 valence electron. Based on this information, what else do you know about Sodium?

Explanation:

that sodium is reactive because it needs one more electron to be full

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)