As given in the last years board paper set 31/2 Q.no. 16
Asked by | 24th Mar, 2009, 10:03: PM
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 | 25th Mar, 2009, 03:47: AM
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