2, Li, Be, B, C, N, O, F, Ne ... 4, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Se, Br, Kr. 5, Rb, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In, Sn, Sb, Te, I, Xe ... The elements can be classified as metals, nonmetals, or metalloids. ... On many periodic tables, a jagged black line (see figure below) along the right side of ...