- Mendeleev was able to come up with the periodic table because of how elements relate with physical, chemical properties as well as atomic mass
- Mendeleev was able to come up with the periodic table after he realized that there is relationship between physical as well as chemical properties of elements and their atomic mass and this relationship was in a 'periodic' way
- he arranged the available elements in such a way that the groups of elements that has similar properties were aligned in vertical columns in his table.
- So with this He arranged the periodic table using the atomic number, and this is arranged into periods and groups.
Therefore, periodic table was arranged into groups and periods
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