The valency of an element is linked to how many electrons an atom must gain or lose to achieve the same electronic structure as a noble gas i.e., have a full outer shell. For example an element in ...

The number of compounds is very large, yet this number is not unlimited, but greatly limited by the properties of an element and it depends mainly upon the valency or polarnumbar. valency and ...

Scientists use the periodic table to quickly refer to information about an element, like atomic mass and chemical symbol. The periodic table’s arrangement also allows scientists to discern trends in ...