Which of the following demonstrates an organ providing a force? The skin protects other organs from damage.
The kidney filters waste from blood.
The eye transmits information to the brain.
The heart contracts and expands to move blood.

the correct answer is boyle

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.