in Mendeleev's periodic table how many elements are present
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63 elements
In 1869, after the rejection of Newlands Octave Law, Mendeleev Periodic table came into the picture. In Mendeleev's periodic table, elements were arranged on the basis of the fundamental property, atomic mass, and chemical properties. During Mendeleev's work, only 63 elements were known.
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student249:
in modern periodic table how many periods and group are present
there are 18 groups with 7 periods excluding actinides and lanthanides
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may be 63 elements i don't know the exact
63 elements
yes
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