alleryStart learning →Atomic number of chlorine is 17. Its electronic configuration is:
A2, 8, 6, 1
B2, 7, 8
C2, 8, 7
D2, 8, 8
Answer & Solution
Correct answer: C. 2, 8, 7
1. Chlorine has 17 electrons.
2. K shell holds 2.
3. L shell holds 8.
4. M shell holds the remaining 17 - 10 = 7.
5. So configuration is 2, 8, 7.
_Source: Selina Concise Chemistry ICSE Class 9, Ch 4 'Atomic Structure'_
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