Question

which scientist is credited with developing the orbital model of the atom?
niels bohr
j.j. thomson
ernest rutherford
democritus

Explanation:

To determine the scientist who developed the orbital model of the atom, we analyze each option:

• J.J. Thomson discovered the electron and proposed the plum - pudding model.
• Ernest Rutherford proposed the nuclear model of the atom.
• Democritus was an ancient philosopher who proposed the idea of atoms in a very basic sense.
• Niels Bohr developed the orbital (or planetary) model of the atom, where electrons orbit the nucleus in specific energy levels.

Answer:

A. Niels Bohr