Read and Answer questions on pages 283 and 286 Read and Answer questions on pages 283 and 286 Make a timeline with the following scientists: Make a timeline.

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Read and Answer questions on pages 283 and 286 Read and Answer questions on pages 283 and 286 Make a timeline with the following scientists: Make a timeline with the following scientists: Democritus Democritus John Dalton John Dalton J. J. Thomson J. J. Thomson Ernest Rutherford Ernest Rutherford Niels Bohr Niels Bohr Underneath each scientist, draw a picture of the atom they theorized Underneath each scientist, draw a picture of the atom they theorized

300 BC 300 BC Father of Modern Atomic Theory Father of Modern Atomic Theory Only his thoughts and ideas, no experiments Only his thoughts and ideas, no experiments

Late 1700’s Late 1700’s Performed experiments Performed experiments Determined atoms could combine Determined atoms could combine

Late 1800’s Late 1800’s Cathode Ray tube experiment showed that atoms have smaller parts with negative charge Cathode Ray tube experiment showed that atoms have smaller parts with negative charge Chocolate chip ice cream model Chocolate chip ice cream model

Early 1900’s Early 1900’s Gold Foil Experiment showed that atoms have a positively charged nucleus Gold Foil Experiment showed that atoms have a positively charged nucleus

mid-1900’s mid-1900’s Most resembles current theory Most resembles current theory Electrons in specific levels or rings around nucleus Electrons in specific levels or rings around nucleus