The first model of the atom was developed through scientific experimentation and data analysis with water vapor and gases. observation of the light emitted by elements when they are heated. thinking about the smallest particles of matter without experimenting. analyzing the effects of a magnet on the path of a cathode ray.

The answer is C: Thinking about the smallest particles of matter without experimenting.

Explanation:

John Dalton proposed the atomic theory according to which all matter is made up of indivisible particles called atoms. His theories were based on law of constant composition and law of conservation of mass. There were few drawbacks in his theory. Later subatomic particles were discovered showing that atoms are further divisible.

real, smaller and upside-down.   so the answer should be b.

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