Electron sharing can be depicted by a Lewis dot structure, in which element symbols are surrounded by dots that represent the valence electrons (electrons in the Blank shell). A Blank bond is the sharing of a pair of valence electrons by Blank atoms. Hydrogen has Blank valence electron(s) in the first shell, but the capacity of the shell is Blank electron(s). When a hydrogen atom comes close enough to a carbon atom for their orbitals to overlap, they can share their electrons. The hydrogen atom is now associated with Blank electron(s) and a Blank bond is formed. As a result, one of the structures does not make sense because hydrogen has only Blank valence electron(s) to share, so it cannot form bonds with two atoms.

Answer 1

Electron sharing can be depicted by a Lewis dot structure, in which element symbols are surrounded by dots that represent the valence electrons (electrons in the outermost shell). A covalent bond is the sharing of a pair of valence electrons by two atoms. Hydrogen has one valence electron(s) in the first shell, but the capacity of the shell is two electron(s). When a hydrogen atom comes close enough to a carbon atom for their orbitals to overlap, they can share their electrons. The hydrogen atom is now associated with two electron(s) and a covalent bond is formed. As a result, one of the structures does not make sense because hydrogen has only one valence electron(s) to share, so it cannot form bonds with two atoms.