The metalloids (B, Si, Ge, As, Sb, Te, Po) are located between the nonmetals and the metals on the left side of the table.
meercury , lead
A Halogen.
I think it was Mendaleev's periodic table.
Phosphorus
lithium
Copper
there are 18 groups in the periodic table.
check out an interesting periodic table at www.calculatoredge.com
Search: Groups on Periodic Table on google.
lanthanum is a element on the perodic table ...
J
Francium