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.
Electron — location?
Orbiting nucleus in electron clouds.
Atomic number — what?
Number of protons in an atom.
Mass number — equals?
Protons plus neutrons in nucleus.
Dalton's model — concept?
Atoms are indivisible solid spheres.
Answer 9 questions on Fundamentals of Atomic Structure.
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?
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