Periodic & Atomic Dudes

Newlands

________: grouped elements based on atomic masses into octaves (rows of 8)

Dobereiner

________: grouped elements into triads based on like properties (gas, liquid, solid)

Mendeleev

________: based his arrangement on atomic mass and columns with similar properties.

Dobereiner

grouped elements into triads based on like properties (gas, liquid, solid)

Newlands

grouped elements based on atomic masses into octaves (rows of 8)

Mendeleev

based his arrangement on atomic mass and columns with similar properties

Moseley

based his arrangement on atomic number