Question

In 18 groups and 7 periods elements are arranged in ___ periodic table
1) Newland
2) Mendeleev
3) modern
4) only 2

Answer 1

Answer:

3rd option (modern) is the correct answer.

Explanation:

Modern periodic table invented by Henry Moseley contains the elements which are arranged in 18 group and 7 period.

Elements are placed according to their atomic number.

Answer 2

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In 18 groups and 7 periods elements are arranged in modern periodic table.

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