Molecules are held together by electrons shared between bonded atoms. For example, consider the formation of an H2 molecule from two separate hydrogen atoms: 2 approachinghydrogen atoms(2 H) a hydrogen molecule(H2) As the two atoms approach, each nucleus begins to attract the other atom's electrons.
Definition of Hyphomycetes. in some classifications. : a subclass of fungi coextensive with the order Moniliales or including both the Moniliales and the Mycelia Sterilia.
Definition of CHORDATE. : any of a phylum (Chordata) of animals having at least at some stage of development a notochord, dorsally situated central nervous system, and gill clefts and including the vertebrates, lancelets, and tunicates.â chordate adjective.See chordate defined for kids. ADVERTISEMENT. any of a phylum (Chordata) of animals having at least at some stage of development a notochord, dorsally situated central nervous system, and gill clefts and including the vertebrates, lancelets, and tunicates. â chordate adjective. See chordate defined for kids. ADVERTISEMENT.