Question

- How

many groups
and periods are present in modern periodic table ------------.



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Answer 1

Answer:

18 groups

7 periods

Explanation:

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Answer 2

In the modern periodic table there are 7 periods and 18 groups consisting of alkali metals, alkaline earth metals, transition metals( heavy metals, weak metals), metalloids, non metals, halogens, noble gases and lanthanide and actinide series.

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