Podcast
Questions and Answers
Smallest
particle of an
element is
called an ______
Smallest particle of an element is called an ______
atom
Building
blocks of
matter
Building blocks of matter
atom
parts of an atom
parts of an atom
electron, proton, neutron, nucleus
Believed that
atom were
uniform, solid,
hard,
incompressible,
and
undestructible
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
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
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
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.
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
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)
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 ______.
