Its atomic number is 2.
2
helium is in the family of noble gases according to the periodic table
Gold is number 79 on the periodic table
The elements arranged according to their atomic number in the table are called periodic table.
periodic number Z: the number of protons
Zirconium is having atomic number 40 in the periodic table. Its symbol is Zr.
helium is in the family of noble gases according to the periodic table
It is not an exception: it is at the top of group 18, the noble gases which is exactly where it should be.
atomic number
Gold is number 79 on the periodic table
the number of helium in the periodic table is 2.
Number 81 on the periodic table is Thallium.
Number 38 on the periodic table is Strontium.
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.
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