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Questions and Answers
Bohr's atomic structure theory is primarily concerned with:
Bohr's atomic structure theory is primarily concerned with:
- The electron and its negative charge
- Electron's arrangement in atoms as orbits (correct)
- The proton and its positive charge
- The nucleus
Ernest Rutherford discovered the atomic nucleus and the electron.
Ernest Rutherford discovered the atomic nucleus and the electron.
False (B)
Who was the first philosopher to propose the existence of the atom?
Who was the first philosopher to propose the existence of the atom?
Democritus
The three fundamental subatomic particles are the proton, neutron, and _____
The three fundamental subatomic particles are the proton, neutron, and _____
Match the scientist with their contribution to atomic theory:
Match the scientist with their contribution to atomic theory:
What statement is true about atoms?
What statement is true about atoms?
A neutron has a positive electric charge.
A neutron has a positive electric charge.
The subatomic particle with a positive electric charge is called a _____
The subatomic particle with a positive electric charge is called a _____
Which statement accurately describes Dalton's atomic theory?
Which statement accurately describes Dalton's atomic theory?
Electrons are positively charged particles found in the nucleus of atoms.
Electrons are positively charged particles found in the nucleus of atoms.
Who proposed the first atomic theory based on indivisible particles?
Who proposed the first atomic theory based on indivisible particles?
The subatomic particle that has no electric charge is a _____.
The subatomic particle that has no electric charge is a _____.
Match the scientists with their discoveries:
Match the scientists with their discoveries:
What aspect of Bohr's atomic model does not hold true today?
What aspect of Bohr's atomic model does not hold true today?
All atoms are electrically neutral.
All atoms are electrically neutral.
Which particle contributes positively to the atomic charge?
Which particle contributes positively to the atomic charge?
Schrödinger's theory indicates that electrons occupy regions of high probability in an atom, known as _____.
Schrödinger's theory indicates that electrons occupy regions of high probability in an atom, known as _____.
In modern atomic theory, which statement is incorrect?
In modern atomic theory, which statement is incorrect?
Flashcards
Bohr's atomic model
Bohr's atomic model
Describes electrons orbiting the nucleus in specific energy levels (orbits).
Rutherford's discovery
Rutherford's discovery
Identified the atomic nucleus and the positive charge of the proton.
Schrödinger's contribution
Schrödinger's contribution
Introduced the concept of electron probability clouds.
Democritus
Democritus
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Electron's charge
Electron's charge
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Dalton's atomic theory
Dalton's atomic theory
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Fundamental subatomic particles
Fundamental subatomic particles
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Electrically neutral atom
Electrically neutral atom
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Bohr's model
Bohr's model
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Atomic Nucleus
Atomic Nucleus
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Proton
Proton
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Electron
Electron
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Neutron
Neutron
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What did Rutherford discover?
What did Rutherford discover?
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What determines an element?
What determines an element?
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Study Notes
Atomic Structure and Models
- Bohr's atomic model: Focuses on electron arrangement in orbits around the nucleus.
- Rutherford's discovery: Identified the atomic nucleus and its positive charge.
- Schrödinger's contribution: Defined regions of high probability for electron location.
- Democritus: First philosopher to propose the existence of atoms, calling them indivisible.
- Thomson's discovery: Identified the electron and its negative charge.
Subatomic Particles
- Proton: Positively charged subatomic particle.
- Electron: Negatively charged subatomic particle.
- Neutron: Subatomic particle with no charge.
- Nucleus: Center of the atom, containing protons and neutrons.
Atomic Models and Theories
- Dalton's atomic theory: Posits that matter is made of indivisible and indestructible atoms.
- Dalton's atomic theory: Different atoms combine to form compounds.
- Uncertainty principle: States that a particle's position and momentum cannot both be precisely known.
- Heisenberg: Developed the uncertainty principle.
Additional Information
- Correct answer to question 1: A. Electron's arrangement in atoms as orbits
- Correct answer to question 2: A. The atomic nucleus and the proton with its positive charge
- Correct answer to question 3: C. There are regions in the atom with high probabilities where an electron can be found
- Correct answer to question 4: A. Democritus
- Correct answer to question 5: A. Thomson
- Correct answer to question 6: D. All of the above
- Correct answer to question 7: B. Electron, proton, and neutron
- Correct answer to question 8: D. All of the above
- Correct answer to question 9: A. Proton
- Correct answer to question 10: B. Electrons
- Correct answer to question 11: B. Neutron
- Correct answer to question 12: D. Heisenberg
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