1. What is a proton in the context of atomic particles?
2. In which year did Rutherford propose the nuclear model of the atom based on his gold foil experiment?
3. What is the primary role of protons in an atom?
Atomic particles — basic units?
Protons, neutrons, and electrons form atoms.
Historical atomic models — first?
Democritus' indivisible atom concept.
Subatomic roles — proton?
Defines element and atomic number.
Atom — definition?
Smallest unit of an element.
Proton — charge?
Positively charged subatomic particle.
Neutron — role?
Contributes to atomic mass, stabilizes nucleus.
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