Valence electrons are outer shell electrons of an atom. They participate in the formation of a chemical bond, if the outer shell of the element is not full. Valency electrons of the first 20 elements Electrons of the first 20…
A reversible reaction is a reaction that can proceed in either direction. One example of a reversible reaction is the reaction between nitrogen and hydrogen to form ammonia. N2(g) + 3H2(g) ⇌ 2NH3(g) A reversible reaction can be shown by the double…
Transition elements are d-block elements that form one or more stable ions with a partially full d subshell. However, not all d-block elements are transition elements by definition. For example, Sc and Zn are d-block elements but they do not fit…
