An element A has an outer electronic configuration 2s22p4. The number of covalent bonds in A2 is:
A
1
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B
2
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C
3
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D
4
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Solution
The correct option is B 2 Based on the outer electronic configuration, the element needs two electrons to attain stable electronic configuration. The element is oxygen and hence it shares two electrons and forms a covalent double bond in A2.