The outermost energy shell of an atom
because they are involved in forming bonds
Wind isn’t an external force that acts in the rock cycle.
The answer is (b). As, vanadium is attached to five fluoride atoms, each flouride containing -1 oxidation state, hence five fluoride contains -5, to neutralize, vanadium should have +5 oxidation state.
Answer: the answer is number 3 which is 6