chem

Q: Who created the first atomic theory?

A: Dalton — Solid Sphere Model (atoms are indivisible; atoms of the same element are identical).

Q: Who discovered the electron using cathode ray tubes?

A: Thompson — Plum Pudding Model (electrons embedded in a positive sphere).

Q: What did Millikan’s oil drop experiment measure?

A: Charge of an electron.

Q: What did Rutherford’s gold foil experiment show?

A: Rutherford — Nuclear Model (atoms are mostly empty space with a dense, positive nucleus).

Q: What model of the atom did Bohr propose?

A: Solar System Model (electrons orbit the nucleus in fixed energy levels).

Q: Who developed the wave equation?

A: Schrödinger

Q: What model did Schrödinger propose

A: Quantum Mechanical Model (electrons behave like waves in orbitals, not fixed paths).