25
#of
protons
# of
neutrons
# of
electrons

Nonmetal halogen family atmoic mass 35

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.

Is a pencil falling to the floor anon contact force, a force, or a contact force