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Question
An element in period 3 whose electron affinity is zero is ______.
Options
Neon
Sulphur
Sodium
Argon
MCQ
Fill in the Blanks
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Solution
An element in period 3 whose electron affinity is zero is argon.
Explanation:
Argon is a noble gas in period 3 with a complete outer shell, so it has zero electron affinity. Neon is also a noble gas but belongs to period 2; sulphur and sodium have non-zero electron affinities.
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