Question

select the correct answer.
which atomic model proposed that electrons move in specific orbits around the nucleus of an atom?
a. dalton’s atomic model
b. thomson’s atomic model
c. rutherford’s atomic model
d. bohr’s atomic model
e. quantum atomic model

Explanation:

To solve this, we analyze each atomic model:

• Dalton's model: Atoms are indivisible, no orbit concept.
• Thomson's model: "Plum - pudding", electrons in a positive sphere, no specific orbits.
• Rutherford's model: Nucleus at center, electrons move randomly, no specific orbits.
• Bohr's model: Electrons move in specific, fixed - energy orbits around the nucleus.
• Quantum model: Electrons in electron clouds, not specific orbits.

So Bohr's model proposed electrons move in specific orbits.

Answer:

D. Bohr’s atomic model