Question

In Mendeleev's periodic table, gap was not left for one of the following elements. This element is
(a) gallium
(b) beryllium
(c) germanium
(d) scandium

Answer 1

Answer:

In Mendeleev's periodic table, gap was not left for Beryllium in his table .

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Answer 2

Answer:

For Beryllium gap was not left by Mendeleev in his periodic table.

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