Question

section 4.1 early ideas about matter
in your textbook, read about the philosophers, john dalton, etc. for each statement below, write true or false.

1. ancient philosophers regularly performed controlled experiments.
2. philosophers formulated explanations about the nature of matter based on their own experiences.
3. both democritus and dalton suggested that matter is made up of atoms.
4. daltons atomic theory stated that atoms separate, combine, or rearrange in chemical reactions.
5. daltons atomic theory stated that matter is mostly empty space.
6. dalton was correct in thinking that atoms could not be divided into smaller particles.
7. daltons atomic theory stated that atoms of different elements combine in simple whole - number ratios to form compounds.
8. dalton thought that all atoms of a specific element have the same mass.
9. democritus proposed that atoms are held together by chemical bonds, but no one believed him.
10. daltons atomic theory was based on careful research.

Explanation:

1. Ancient philosophers did not conduct controlled experiments.
2. Philosophers did formulate explanations based on experiences.
3. Both Democritus and Dalton had atom - related ideas.
4. Dalton's atomic theory had statements about atoms in reactions.
5. Dalton's theory did not state matter is mostly empty space.
6. Atoms can be divided into sub - particles, so Dalton was wrong.
7. Dalton's theory included atoms combining in whole - number ratios.
8. Dalton thought atoms of an element were identical.
9. It's not true that no one believed Democritus.
10. Dalton's theory was based on research.

Answer:

1. False
2. True
3. True
4. True
5. False
6. False
7. True
8. True
9. False
10. True