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Question
Select the correct answer from the choice in the bracket to complete the sentence:
An element ‘X’ has six electrons in its outer or valence shell. Its valency is __________.
Options
+2
−2
−1
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Solution
An element ‘X has six electrons in its outer or valence shell. Its valency is −2.
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Multiple Choice Questions
The outermost shell of an atom is known as
Tick the most appropriate answer.
How many times is a proton heavier than an electron?
- 1500
- 1800
- 1840
- none of these
ANSWER IN DETAIL
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State its one drawback of Rutherford’s atomic model.
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If an atom ‘A’ has an atomic number of eleven, state the number of protons and electrons it contains.
