the Periodic Table is set up by atomic number, obviously. the atomic number is equal to the amount of protons, so the periodic table is set up by amount of proton order.
During the time more than 100 versions of the periodic table were proposed.
See the link bellow for some details; also the links of this...link.
There have been two make ups of the periodic table so far Mosley made the first one but was overtaken by Dimitri Mendeleev's form, which we use today.
Through compounds (one element plus another (only some have been found the periodic table always changes))
Elements have been and still are being added
Sulfur has been known since ancient times and was not "added" to the periodic table. It has always been a recognized element and was formally included in the periodic table in the 19th century by Dmitri Mendeleev.
you find the ones that have been added to the periodic table in the old days
No one give number to elements in periodic table. they have been calculated
Tin has been known since antiquity, and has been in the periodic table since the table was developed by Dmitri Mendeleev in the late 1860's.
The Lanthanides and the Actinides have been moved in the periodic table simply to save space. --PainRain
He is important because he was the person who invented the Periodic Table and made it how it is today
That stands for "One hundred eight Elements in the Periodic Table", but this is now obsolete. As of 2008, at least 117 elements have been discovered.
At present, the element has been labeled as ununpentium, which refers to its position in the periodic table- 115th.
Every chemistry student needs to know the periodic table.The periodic table lists the elements that have been discovered so far.