The valency of chromium can vary depending on the specific compound or context in which it is found. Chromium is a transition metal that exhibits multiple oxidation states. The most common oxidation states of chromium are +2, +3, and +6.
In its +2 oxidation state, chromium loses two electrons and has a valency of 2+. In the +3 oxidation state, it loses three electrons and has a valency of 3+. In the +6 oxidation state, chromium gains six electrons and has a valency of 6+.
It's important to note that the valency of an element refers to its combining capacity or the number of electrons an atom can gain, lose, or share to form chemical bonds. The valency of chromium is determined by the number of electrons it gains or loses to achieve a stable electron configuration.