Science, asked by bhaktimeherkar, 7 months ago

There are ...groups and...periods in the modern periodic table.

Answers

Answered by ITSJATINSINGH

2

Explanation:

There are 18 groups and 7 periods in the modern periodic table. (a) The atomic size and metallic character of elements increase down a group.

Answered by Anonymous

2

Explanation:

18 groups and 7 periods.

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