Question

answer this question in one word​

Answer 1

1)18

2)8

3)Mendeleev

4) Newland

5)arrange according to atomic mass and similar chemical properties

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Answer 2

1 . 18

2 . 8

3 . Gregor Mendel

4 . Gilbert N. Lewis

5 . 1 . he arranged the elements in the increasing order of atomic mass.

2 . he put elements of similar properties in a group.

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