I think it was Mendaleev's Periodic Table.
Phosphorus
meercury , lead
Copper
Search: Groups on Periodic Table on google.
check out an interesting periodic table at www.calculatoredge.com
J
Francium
Dmitri Mendeleev in 1869
check out this amazing Perodic table at www.calculatoredge.com
The periodic table of elements arranges all of the known chemical elements.
At last count we were up to 114.
Ne Neon, a noble gas.