atomic theorists
periodic table
units
100

first atomic theorist

dalton

100

Atomic number of s

16

100

units for mass

g

200

Second atomic theorist

thomson

200

Atomic number of Au

79

300

Third atomic theorist

Bohr

300

atomic number of Xe

54

400

Second to last atomic theorist

Rutherford 

400

periodic number is Bi

83

500

Last atomic theorist

Schrodinger


500

Atomic number of Og

118