Number 81 on the periodic table is Thallium.
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The 38 elements in groups 3 through 12 of the periodic table are the transition metals.
The number of each period in the modern periodic table represents the number of shells. There are 7 periods in periodic table.
They form the periodic table of elemennts (the table of Mendeleev).
atomic number
the number of helium in the periodic table is 2.
Number 81 on the periodic table is Thallium.
Gold is number 79 on the periodic table
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The elements arranged according to their atomic number in the table are called periodic table.
The number of each period in the modern periodic table represents the number of shells. There are 7 periods in periodic table.
The 38 elements in groups 3 through 12 of the periodic table are the transition metals.
It is number 56 on the Periodic Table of Elements
According to the modern periodic table "Elements are the periodic function of their atomic number".They are arranged in increasing atomic no. in the periodic table.
The periodic table is arranged by the Atomic Number
No one give number to elements in periodic table. they have been calculated