What could be a third quantum number of a 2p³ electron in phosphorus, 1s²2s²2p⁶3s²3p³? A: mI = 3
B: mI = -2
C: mI = -1
D: mI = 2

Fine out your self ponk

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.