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MIDDLE SCHOOL

Physical Science

Structure and Properties of Matter

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Structure and Properties of Matter: Atom

Bohr's Atomic Model

Description

Bohr’s Atomic Model

Proposed by Niels Bohr in 1913, Bohr’s atomic model describes how electrons move in specific orbits around an atom’s nucleus. This model introduced the concept that electrons exist in fixed energy levels and can transition between them by absorbing or releasing energy. Bohr’s...

Transcript

In 1897, J.J. Thomson pictured atoms as spheres with scattered electrons. By 1911, Ernest Rutherford discovered the nucleus but couldn’t explain the electrons’ arrangement around it.

In 1913, Niels Bohr proposed that the electrons orbit the nucleus at fixed distances based on their energy. These fixed distances, called energy levels, are l...

Tags

Bohr Atomic ModelElectron Energy LevelsAtomic SpectraElectron OrbitsQuantum MechanicsAtomic StructureElectron TransitionsScale Proportion QuantityDeveloping Using ModelsCrosscutting Concepts

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