2CH4 and C2H8 have the same number and kind of elements. how are they different

I am not quite sure what the answer to your question means.

Explanation:

I don't think I have done anything like that before but these should help some.

Hope this helps! ;)

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

so what is the problem with your lab report and whats the subject of the lab report? i will you