Rurtherford's experiment, which established the nuclear...

Rurtherford's experiment, which established the nuclear model of the atom, used a beam of (a) $\beta$-particles, which impinged on a metal foil and got absorbed (b) $\gamma$-rays, which impinged on a metal foil and ejected electrons (c) helium atoms, which impinged on a metal foil and got scattered (d) helium nuclei, which impinged on a metal foil and got scattered

Rurtherford's experiment, which established the nuclear model of the atom, used a beam of
(a) $\beta$-particles, which impinged on a metal foil and got absorbed
(b) $\gamma$-rays, which impinged on a metal foil and ejected electrons
(c) helium atoms, which impinged on a metal foil and got scattered
(d) helium nuclei, which impinged on a metal foil and got scattered

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Key Concepts

Nuclear Model of the Atom

This concept states that an atom is composed of a compact, positively charged nucleus surrounded by negatively charged electrons. The nuclear model was established when experimental evidence showed that a small, dense center existed, which held most of the atom’s mass and positive charge, fundamentally altering our view of atomic structure.

Alpha Particles

Alpha particles are essentially helium nuclei, consisting of two protons and two neutrons. They are used in experiments to probe atomic structure because their relatively high mass and charge cause them to be deflected by a concentrated positive charge, revealing the presence of a nucleus within an atom.

Scattering Experiments

Scattering experiments involve directing a beam of particles at a thin foil to observe how the particles are deflected. The patterns of deflection help scientists infer the internal structure of atoms. In the Rutherford experiment, a few particles were deflected at large angles, indicating a small, dense nucleus, while most passed through, leading to the development of the nuclear model of the atom.

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