Most chemists attribute the discovery to Dmtri Mendeleev.
No one discovered the Periodic Table, it was an invention to organize elements made by Dmitri Mendeleev
In 1969-70, by Dmitri Ivanovich Mendeleev
Mandaleev
Robert Hooke was in his kitchen on his oak table when he discovered cells.
atomic number
It was actually been discovered for thousands of years! John Dice just discovered it but it was discovered for thousands of years. :)
Some tables can be extended by pulling at both ends of the table to open up a space in the middle of the table, then inserting another piece of table top. This piece you insert is called a table leaf. If you have a table that can hold a few of them, they are called table leaves.
DEARBORN discovered this disease in 1932
A Halogen.
I think it was Mendaleev's periodic table.
Phosphorus
meercury , lead
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