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Smallest particle of an element is called an ______
atom
Building blocks of matter
atom
parts of an atom
electron, proton, neutron, nucleus
Believed that atom were uniform, solid, hard, incompressible, and undestructible
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thoughts on the belief that all things on earth develop from 4 main elements of matter; Fire, Water, Earth and air
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It states that all objects are made of particles called atoms and that they are solid spheres that cannot be divided
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It describe the atom as negatively charged particles swimming a positively charged sea
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It states the negatively charged electrons surround the nucleus of an atom. He also claimed that the electrons surrounding the nucleus revolve around it with very high speed in circular paths.
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It states that a small positively charged nucleus is surrounded by revolving negatively charged electrons in fixed orbits
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describe the possibility of placing electrons within an atom by describing the principal energy level, energy level, orbital (arbitrary level)
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Study Notes
Atom Definition and Composition
- The smallest particle of an element is called an atom.
- Atoms are considered the building blocks of matter.
Historical Beliefs About Atoms
- Early beliefs described atoms as uniform, solid, hard, incompressible, and indestructible.
- The concept existed that all things on Earth originated from four main elements: Fire, Water, Earth, and Air.
Dalton's Atomic Theory
- Proposed that all objects are made of indivisible solid spheres known as atoms.
Thomson's Model
- Introduced the idea of negatively charged electrons existing in a positively charged "sea."
- Described atoms as comprised of negatively charged particles (electrons) swimming in a positively charged background.
Rutherford's Model
- Suggested that negatively charged electrons surround a small, positively charged nucleus.
- Electrons revolve around the nucleus at high speeds, adhering to circular paths.
Bohr's Model
- Explained that a central, positively charged nucleus is orbited by negatively charged electrons in fixed orbits.
- Introduced the concept of energy levels, where electrons can occupy principal energy levels and specific orbitals.
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Description
Test your knowledge on the smallest particle of an element with this quiz. Identify the correct term to complete the sentence: Smallest particle of an element is called an ______.
