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