valency

of: an element

is: the property that determines its ability to combine with other elements.   [P8.4]

is equal: to the number of atoms of hydrogen that combine with one atom of the element.   [P8.4]

alternatively can be determined: if the element does not combine with hydrogen, from the known valency of another element with which it does combine.   [P8.4]

Copyright 1997, The Open University