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Chemistry : Matter and Change

Chemistry : Matter and Change. Chapter 4 The Structure of the Atom. Chemistry : Matter and Change. Section 4.1 Early Ideas About Matter. Chemistry : Matter and Change. Objectives Compare and contrast the atomic models of Democritus, Aristotle, and Dalton.

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Chemistry : Matter and Change

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  1. Chemistry: Matter and Change Chapter 4 The Structure of the Atom George M. McKelvy, Ph.D.

  2. Chemistry: Matter and Change Section 4.1 Early Ideas About Matter George M. McKelvy, Ph.D.

  3. Chemistry: Matter and Change Objectives Compare and contrast the atomic models of Democritus, Aristotle, and Dalton Understand how Dalton’s theory explains the conservation of mass. George M. McKelvy, Ph.D.

  4. Chemistry: Matter and Change Review Vocabulary theory: an explanation supported by many experiments; is still subject to new experimental data, can be modified, and is considered successful if it can be used to make predictions that are true George M. McKelvy, Ph.D.

  5. Chemistry: Matter and Change New Vocabulary Dalton’s atomic theory George M. McKelvy, Ph.D.

  6. Chemistry: Matter and Change The ancient Greeks tried to explain matter, but the scientific study of the atom began with John Dalton in the early 1800’s. George M. McKelvy, Ph.D.

  7. Philosophers Chemistry: Matter and Change Many ancient scholars believed matter was composed of such things as earth, water, air, and fire. Many believed matter could be endlessly divided into smaller and smaller pieces.

  8. Philosophers Chemistry: Matter and Change Democritus (460-370 B.C.) was the first person to propose the idea that matter was not infinitely divisible, but made up of individual particles called atomos or atoms. Aristotle (484-322 B.C.) disagreed with Democritus because he did not believe empty space could exist. Aristotle’s views went unchallenged for 2,000 years until science developed methods to test the validity of his ideas. George M. McKelvy, Ph.D.

  9. Philosophers Chemistry: Matter and Change

  10. Philosophers Chemistry: Matter and Change John Dalton revived the idea of the atom in the early 1800s based on numerous chemical reactions. Dalton’s atomic theory easily explained conservation of mass in a reaction as the result of the combination, separation, or rearrangement of atoms.

  11. Philosophers Chemistry: Matter and Change

  12. Chemistry: Matter and Change Assessment Who was the first person to propose the idea that matter was not infinitely divisible? • Aristotle • Plato • Dalton • Democritus George M. McKelvy, Ph.D.

  13. Chemistry: Matter and Change Assessment Who was the first person to propose the idea that matter was not infinitely divisible? • Aristotle • Plato • Dalton • Democritus George M. McKelvy, Ph.D.

  14. Chemistry: Matter and Change Assessment Dalton’s theory also conveniently explained what? • the electron • the nucleus • law of conservation of mass • law of Democritus George M. McKelvy, Ph.D.

  15. Chemistry: Matter and Change Assessment Dalton’s theory also conveniently explained what? • the electron • the nucleus • law of conservation of mass • law of Democritus George M. McKelvy, Ph.D.

  16. Philosophers Chemistry: Matter and Change Extra

  17. Chemistry: Matter and Change George M. McKelvy, Ph.D.

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