alleryHow many groups and periods are in the modern periodic table?
A7 groups and 18 periods
B18 groups and 7 periods
C8 groups and 7 periods
D7 groups and 8 periods
Answer & Solution
Correct answer: B. 18 groups and 7 periods
1. The modern periodic table has vertical columns called groups.
2. It has horizontal rows called periods.
3. There are 18 groups and 7 periods in the modern table.
4. Hence the correct answer is 18 groups and 7 periods.
_Source: Selina Concise Chemistry ICSE Class 10, Ch 1 'Periodic Table' (aplustopper.com extract)_
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