All elements can be classified in one of three classes: metals, metalloids, or nonmetals. _ in each class share certain basic properties.

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

Particles vibrate in a rigid structure and do not move relative to their neighbors.

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.