Aueyeowosy yo this is my answer
One would be phosporous whose configuration is 1s2 2s2 2p6 3s2 3p3
The activity series goes top to bottom, most active to least active elements, going: Li, K, Ba, Sr, Ca, Na, Mg, Mn, Zn, Fe, Cd, Co, Ni, Sn, Pb, H, Cu, Ag, Hg, Au.
Thus, your list of metals would go from most reactive to least reactive: Li, K, Mg, Zn, Fe, Cu, Au
Answer:
i want to say nuclues but again i also think that it is electron shells
