What is the number of valence electrons in an atom that has an atomic number of 13?How do I figure this out?thank you!
Firstly, get your periodic table outAll the elements in each group has the amount of valence electrons as followed Group 1 (The column vertically down that contains H,Li,Na,K,Rb,Cs,Fr): 1 Valence Electron Group 2 (The column vertically down that contains Be,Mg,Ca,Sr,Ba,Ra): 2 Valence Electrons Group 3 (The column vertically down that contains B,Al,Ga,In,Tl): 3 Valence Electrons Group 4 (The column vertically down that contains C,Si,Ge,Sn,Pb): 4 Valence Electrons Group 5 (The column vertically down that contains N,P,As,Sb,Bi): 5 Valence Electrons Group 6 (The column vertically down that contains O,S,Se,Te,Po): 6 Valence Electrons Group 7 (The column vertically down that contains F,Cl,Br,I,At): 7 Valence Electrons Group 8 (The column vertically down that contains He,Ne,Ar,Kr,Xe,Rn): 8 Valence Electrons So atomic number 13 is Aluminum which belongs in Group 3Therefore, Aluminum has 3 Valence Electrons.
