In subsequent chapters, we will introduce some results of this research to demonstrate the biological importance of many of the elements and their compounds.
Elements coloured light blue form giant covalent structures, whereas those coloured dark blue form small covalently bonded molecules that are held together by weaker.
As you work through this text, you will encounter the names and symbols of the elements repeatedly, and much as you become familiar with characters in a play or a film, their names and symbols will become familiar.
Metallic bonding is thus possible when the number of electrons delocalised by each atom is less than twice the number of orbitals contributing to the overlap.
"Abundance of live 244Pu in deep-sea reservoirs on Earth points to rarity of actinide nucleosynthesis".