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Questions and Answers
What did ancient Greeks think everything was made of?
What did ancient Greeks think everything was made of?
- Molecules
- Tissues
- Atoms (correct)
- Cells
What did Dalton think atoms were like?
What did Dalton think atoms were like?
- Specific paths around the nucleus
- Small, dense centers
- Tiny balls that could be split
- Tiny balls that couldn't be split (correct)
What did Rutherford show about atoms?
What did Rutherford show about atoms?
- Atoms are made up of electrons
- Atoms have a small, dense center called a nucleus (correct)
- Atoms are like tiny balls that can be split
- Atoms are made up of molecules
What did Bohr say about electrons?
What did Bohr say about electrons?
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What is used to understand atoms nowadays?
What is used to understand atoms nowadays?
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Study Notes
Evolution of the Atomic Model
- Ancient Greeks proposed that everything is composed of tiny particles called atoms.
Dalton's Contribution (1803)
- John Dalton described atoms as tiny, indivisible balls.
Discovery of Subatomic Particles (Late 1800s - Early 1900s)
- Scientists discovered smaller parts within atoms, including electrons.
Rutherford's Contributions
- Ernest Rutherford showed that atoms have a small, dense center called the nucleus.
Bohr's Model
- Niels Bohr proposed that electrons move in specific paths around the nucleus, similar to planets orbiting the sun.
Modern Understanding of Atoms
- With the development of quantum mechanics, we now understand that electrons behave like waves around the nucleus.
- Each advancement in the atomic model has been driven by new experiments and ideas, leading to a deeper understanding of atoms over time.
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