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4. Structure of Atom
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Q42 of 149 Page 211

Which of the following elements does not exhibit electrovalency?

Carbon do not exhibit electrovalency.

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40

Elements having valency ‘one’ are:

41

In a sample of ethyl ethanoate (CH3COOC2H2), the two oxygen atoms have the same number of electrons but different number of neutrons. Which of the following is the correct reason for it?

43

The number of valence electrons in a graphite atom is:

44

The atomic numbers of four elements A, B, C and D are 12, 13, 15 and 3 respectively. The element which cannot form a cation is:

Questions · 149
4. Structure of Atom
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