Answer:
The Lewis dot structure for H is H, while the Lewis dot structure for He is He. The difference is due to the different number of valence electrons in each atom. H has one valence electron, while He has two valence electrons.
Step-by-step explanation:
The explanation for this is that, according to the octet rule, atoms will tend to form bonds until they have eight valence electrons around them. H only has one valence electron, so it can only form one bond. He, on the other hand, has two valence electrons, so it can form two bonds.