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Questions and Answers
What are the three subatomic particles that make up the atomic structure of matter?
Protons, electrons, and neutrons
Who first proposed that matter is composed of atoms?
Democritus
What is the nucleus of an atom composed of?
Protons and neutrons
What does the atomic number of an element describe?
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Who proposed the first scientific theory of atomic structure in the 1800s?
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Study Notes
Atomic Structure
- The three subatomic particles that make up the atomic structure of matter are protons, neutrons, and electrons.
- The ancient Greek philosopher Democritus first proposed that matter is composed of atoms.
Atomic Nucleus
- The nucleus of an atom is composed of protons and neutrons.
Atomic Number
- The atomic number of an element describes the number of protons present in the nucleus of an atom, which determines the identity of the element.
Early Atomic Theory
- John Dalton proposed the first scientific theory of atomic structure in the 1800s.
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Description
Test your knowledge of atomic structure, electrons, protons, neutrons, and atomic models with this quiz. Learn about the history of atomic structure and quantum mechanics, and discover the fascinating world of subatomic particles.
