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CBSE Class 10 Answered

As given in the last years board paper set 31/2 Q.no. 16
Asked by | 24 Mar, 2009, 10:03: PM
answered-by-expert Expert Answer

Isotopes are atoms of the same element having different atomic mass but same atomic number. For e.g., there are three isotopes of hydrogen with atomic mass 1, 2, and 3. According to Mendeleev's periodic table these should be placed at three separate places. However isotopes have not been given separate places in the periodic table as given by him. 

Answered by | 25 Mar, 2009, 03:47: AM

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