Rutherford's gold foil experiment led to the conclusion that atoms contain a dense, positively charged center. What is this center commonly called?

Rutherford's gold foil experiment led to the conclusion that atoms contain a dense, positively charged center. What is this center commonly called?

• A. Proton cloud
• B. Electron shell
• C. Nucleus
• D. Neutron bag

Answer: (C)

The dense, positively charged center of an atom is called the nucleus. Rutherford’s gold foil experiment revealed that most of the atom is empty space, but a tiny region near the center carries a concentrated positive charge strong enough to deflect some incoming particles. That central core is the nucleus, where protons (positive charge) and neutrons (no charge) reside, giving the nucleus its mass. Electrons orbit around this core in regions called electron shells or clouds, which accounts for the rest of the atom’s structure. Terms like proton cloud or electron shell refer to different parts of the atom, not the central core, and neutron bag isn’t a standard description.

The dense, positively charged center of an atom is called the nucleus. Rutherford’s gold foil experiment revealed that most of the atom is empty space, but a tiny region near the center carries a concentrated positive charge strong enough to deflect some incoming particles. That central core is the nucleus, where protons (positive charge) and neutrons (no charge) reside, giving the nucleus its mass. Electrons orbit around this core in regions called electron shells or clouds, which accounts for the rest of the atom’s structure. Terms like proton cloud or electron shell refer to different parts of the atom, not the central core, and neutron bag isn’t a standard description.