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प्रश्न
In Mendeleev's periodic table, gaps were left for the elements to be discovered later on. An element which found a vacant place in the periodic table later on is:
(a) Be
(b) Si
(c) Ge
(d) Se
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उत्तर
(c) Ge.
Germanium (eka- silicon) is the element which found a vacant place in the periodic table later on.
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