Mention 4 defects in Mendeleev's periodic table.
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5
Disadvantages :-
1. Couldn't explain position of Hydrogen
2.Couldn't answer the question "Can we have an element with atomic mass 3 between Hydrogen and Helium
3 He placed cobalt before Nickel though Cobalt has more mass
1. Couldn't explain position of Hydrogen
2.Couldn't answer the question "Can we have an element with atomic mass 3 between Hydrogen and Helium
3 He placed cobalt before Nickel though Cobalt has more mass
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3
1.He couldn't explain the position of hydrogen.
2.He couldn't explain the position of isotopes.
3.There is a problem of atomic mass.
2.He couldn't explain the position of isotopes.
3.There is a problem of atomic mass.
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