5 Questions
What did ancient Greeks think everything was made of?
Atoms
What did Dalton think atoms were like?
Tiny balls that couldn't be split
What did Rutherford show about atoms?
Atoms have a small, dense center called a nucleus
What did Bohr say about electrons?
Electrons move in specific paths around the nucleus
What is used to understand atoms nowadays?
Quantum mechanics
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.
Explore the evolution of the atomic model from ancient Greece to modern discoveries, including Dalton, Rutherford, and Bohr's contributions. Learn about the changing understanding of atoms, electrons, and the nucleus.
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