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Metallic Bonding: The Electron-Sea Model & Why Metals Are Good Electrical Conductors - Video & Lesson Transcript |

Scanning electron micrograph of fertilization in the sea urchin. x700 (at 4x4" Rights Managed Image Image No.BH1265 ArtistDavid M. Phillips AgencyPR Science Model Release - NoProperty Release - No Rate this image: Save to disk Print image Contact us Email image Focus your search magnification magnified micrograph micrographs micrography microscopy reproduction science sea urchin sem Scanning electron micrograph of fertilization in the sea urchi

This is a false-colored scanning electron micrograph of a zebrafish embryo, a popular disease model and study system for drug development and cancer research.


Inner ear hair cells. Coloured scanning electron micrograph (SEM) of sensory hair cells from the inner ear. These cells are surrounded by a fluid called endolymph. As sound enters the ear it causes waves to form in the endolymph, which in turn cause the hairs to move. The movement is converted to an electrical signal that is passed on to the brain. Each crescent-shaped arrangement of hairs lies atop a single cell.

Crystal field theory is a model that describes how the electrons fill in the outer energy levels or orbital in the presence of ligands. Crystal field theory also describes the strength of the bond, but it cannot attempt to describe the actual bonding.