15
QuizMultiple Choice

Atomic Structure and the Periodic Table — Test

Question 15 • Chemistry

Which scientist is known for developing the planetary model of the atom?

Answer
A
Robert Millikan
B
Niels Bohr
C
Albert Einstein
D
Johannes Rydberg

Explanation

Niels Bohr developed a model in which electrons move around the nucleus in specific orbits, often described as a planetary model. Robert Millikan measured the electron’s charge, Einstein is known for relativity, and Rydberg’s work relates to spectral lines.

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