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1.The first scientist who arranged the elements into group of threes with the same properties was...

1.The first scientist who arranged the elements into group of threes with the same properties was

a. Dobreiner

b. Newlands

c. Dalton

d. Mendellev

2. Elements were also grouped by eight. This was devised by

a. Dobreiner

b. Newlands

c. Dalton

d. Mendellev

3.The modern periodic table was devised

a. Dobreiner

b. Newlands

c. Dalton

d. Mendellev

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