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In more than 150 years the periodic table had many versions; hundred versions of this table are known. The sole official table is today the IUPAC Periodic Table.
There are 91 metals in the periodic table today, but new ones are added as time passes.
Many more elements are known today then when Mendeleev laid out his table. In addition, he arranged his table by atomic mass and there are places in the periodic table where mass does not always increase. An example is between tellurium and iodine.
periodic table stands for all the elments scientist have found till today. Example: gold, silver, oxegon, carbon dioxide,ect.
the answer is mendeleev
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.
Chemists
In more than 150 years the periodic table had many versions; hundred versions of this table are known. The sole official table is today the IUPAC Periodic Table.
There are 91 metals in the periodic table today, but new ones are added as time passes.
well every known materialthat we asociate with is listed in the periodic table.
A group is a column in the periodic table of elements.
Henry Moseley
Dmitri Mendeleev.
Today (June 2013) the periodic table contain 118 chemical elements, natural or artificial.
he drew up a table that grouped elements according to their atomic weights, his table became the basis for the periodic table of elements used today.
Henry Moseley in 1914
No there are still undiscovered elements