Question

The table given below lists the contributions and names of scientists who made earlier attempts in the classification of elements. Fill in the blanks.

Contribution/Findings	Name of Scientist
Triads	..........
Classification of elements into metals and nonmetals	Newlands
Classification of elements into metals and nonmetals	............
Modern periodic law	.........

Answer 1

Contribution/Findings	Name of Scientist
Triads	Dobereiner
Law of octaves	Newlands
Classification of elements into metals and nonmetals	Antonie Lavoisier
Modern periodic law	Henry Moseley