Can somebody help me please! Help would be much appreciated :))

The first picture shows how the two H athoms finds each other. The second one, how these H athoms start's to form a covalent bond describing it by Lewi's estructure. And the last one, shows how the two athoms of H formed an H2 molecula.

Explanation:

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

catya your not at all which answer i've seen you do this on another question!