Q.2: Answer the following questions:
(6)
1. Mendeleev predicted the existance of two elements and named them as Eka-silicon and Eka-aluminium
a) Name the elements which took over their position in later stage
b) Predict the valencies of these elements
c) Write down their oxides formula.
Answers
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Answer:
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Explanation:
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Answered by
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Answer:
gallium and germanium
Explanation:
(b)1 and 2
(c)Ga2O and GeO
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