Why can hydrogen only form one covalent bond? a: it is too small to form more than one bond

b: it only needs two electrons to be stable.

c: it is too large to form more than one bond

d: because it usually forms ionic bonds

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.

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

hope this

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.