Question

Which of the following about modern periodic table is correct?

(1.0)Marks
Answer:


18 horizontal rows called as periods

7 vertical columns called periods

18 vertical columns called groups

7 horizontal rows called groups​

Answer 1

Answer:

7 horizontal rows called group

Answer 2

Answer:

3)- 18 vertical columns called groups

Explanation:

The modern periodic table has 18 vertical columns which are known as groups and seven horizontal rows known as periods

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