Braineos2

Roentgen

measurement of radiation named after him

becquerel

further studied roentgen's work with x-ray

heisenberg

treats electrons as waves, modern quantum theory

Qualitative observation

observation is an activity of a living being which is involved through scenes (sight,smell)

Quantitative observation

observation that can be measured in numbers (volume, length)

schroginger

helped to locate an electron in an atom

bohr

explained why excited electrons gave off certain colors of light




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