pH ranges from 0 to 14, with 7 being neutral. pHs less than 7 are acidic while pHs greater than 7 are alkaline (basic).
Space, time, imagination, and money
I think the answer would be 4 because electrons are not located in the nucleus so it wouldn't be 3 and the valence electrons are the ones that are usually transferred and involved in chemical reactions
Elements ------------------> Formulae
a). Sodium ---------------> Na
b). Potassium ----------> K
c). Calcium --------------> Ca
d). Barium ---------------> Ba
