Question

Write answer in one word/Sentence :

1. How many groups are there in modern periodic table ?

2. How many elements are there in second period?

3. Who is the father of modern periodic table?

4. Who gave Octave rule.

5. What is the criteria of Mendeleev for his periodic table.

Answer 1

1. 18

2. 2

3.Dmitri Mendeleev

4. J.A.R. Newlands

5. atomic mass

Answer 2

1) 18

2) 8

3) Henry Moseley

4) John Newland in 1866

5) Atomic mass

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#hope it help uh.

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