what are the two criterias used in the development of modern periodic table?
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Two criterias are:-
1) Arranged in the order of increasing atomic number
2) The elements having same valence shell are placed in the same period while the elements having same valence electron are placed in the same group
3) This periodic table have 18 groups and 7 periods
( any 2)
1) Arranged in the order of increasing atomic number
2) The elements having same valence shell are placed in the same period while the elements having same valence electron are placed in the same group
3) This periodic table have 18 groups and 7 periods
( any 2)
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