I think it was Mendaleev's Periodic Table.
Phosphorus
meercury , lead
Copper
check out an interesting periodic table at www.calculatoredge.com
Search: Groups on Periodic Table on google.
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.