PLEASE HELP ME

Using the periodic table, complete the table to describe each atom. type in your answers.a ? b? c? d? e? f?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

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.