Chemists
Many people do to determine which element is in a substance ex: me, scientists
There are 91 metals in the periodic table today, but new ones are added as time passes.
i don't know the scientist but it is the periodic table of the elements
"Ai" is not a standard element symbol on the periodic table. It may be a typo or error. The periodic table typically uses two-letter symbols to represent elements, such as "Al" for aluminum or "Ag" for silver.
well every known materialthat we asociate with is listed in the periodic table.
Henry Moseley
all family of periodic table thier properties and uses
Dmitri Mendeleev.
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.
Hydrogen is the first chemical element in the Periodic Table of Mendeleev.
Henry Moseley in 1914
No there are still undiscovered elements