Question

Variable valency is due to loss of electrons from

Answer 1

Answer:

variable valency is generally shown by d-block element( transition elements) , in transition elements, an atom loses electrons from the shell next to the valence shell (penultimate shell). In such a situation the element exhibits more than one valency (variable valency).

Answer 2

Answer:

Variable valency is due to loss of electrons from penultimate shell.