Bohr classified elements according to their atomic _____.
The elements were arranged based on their similarities and dissimilarities in the periodic table. The periodic table consists of 7 periods and 18 groups.
The long form of the periodic table was given by scientist Bohr. The classification of elements were based on atomic numbers.
The addition of number of protons and number of neutrons of an element in the nucleus is atomic number. It goes in ascending order on moving from left to right of the period.
Final answer:
Bohr classified elements according to their atomic numbers.