alleryStart learning →Why is the third period of the periodic table also called a short period?
AIt has only 2 elements under typical conditions
BIt has 8 elements, far fewer than long periods
CIt is shorter than period 1
DIt contains only metals
Answer & Solution
Correct answer: B. It has 8 elements, far fewer than long periods
1. Periods 2 and 3 each have 8 elements.
2. They lack d-block elements.
3. Periods 4 and 5 contain 18 elements due to the 10 d-block elements.
4. So periods 2 and 3 are called short periods.
_Source: Selina Concise Chemistry ICSE Class 9, Ch 5 'The Periodic Table'_
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