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The atomic number of three elements A, B...

The atomic number of three elements A, B and C are 10 , 18 and 8 respectively . Identify the element which is chemically reactive ?

A

A

B

B

C

C

D

Both a and B

Text Solution

Verified by Experts

The correct Answer is:
3
`{:("Element","Atomic number","Electronic configuration"),(" "A," "10," "2_(,)8_(,)),(" "B," "18," "2_(,)8_(,)8),(" "C," "8," "2_(,)6):}`
Hence , 'C' is chemically reactive . A and B are chemiclly inert because of stable octet configuration.
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