Function: noun
Date: 1922
: a single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of the atom
Function: noun
Date: 1922
: a single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of the atom
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012