Biology, asked by Shivajimilke, 1 month ago

10. Boron and oxygen elements are placed in the second period in periodic table.
There was no definitive place for isotope in Mendeleev's periodic table.
12.
Lithium and sodium are included in the same group in periodic table.
11.
davvoen elements have different at

Answers

Answered by javeedpasha3136

0

Answer:

during mendeleev time there are no isotopes kn his period

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