8.5A
Atoms
Picture Vocabulary
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Rice University – All Rights Reserved
Atom
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The smallest unit of an element that has all of
the properties of that element containing a
nucleus within an electron cloud
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Nucleus
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Positively charged protons
occupy space within the
nucleus the nucleus and cause
the nucleus to have an overall
positive charge
The tiny, very dense, positively charged region
in the center of an atom; made up of protons
and neutrons
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Electron Cloud
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Negatively charged electrons
occupy the space within the
electron cloud and cause the
electron cloud to have an
overall negative charge
All of the area inside an atom surrounding the
nucleus where electrons are found
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Matter
Anything that has volume and mass
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Electrical Charge
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Each electron has a negative charge
Each proton has a positive charge
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Neutrons are without charge
A form of charge, designated negative, positive, or
neutral (without charge) that is found on the
subatomic particles that make up all atoms
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Rice University – All Rights Reserved
Protons
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A positively charged subatomic particle of the
nucleus of an atom and contributes to the
mass of the atom
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Rice University – All Rights Reserved
Neutrons
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A subatomic particle of the nucleus of an atom
that is without charge and contributes to the
mass of an atom
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Rice University – All Rights Reserved
Electron
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A negatively charged subatomic particle of
the electron cloud; involved in the formation
of chemical bonds
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Rice University – All Rights Reserved
Subatomic Particles
Hydrogen atom = 1 proton and 1 electron
Carbon atom = 6 protons,
6 neutrons, and 6 electrons
Pure corn
syrup, 100% glucose
Oxygen atom = 8 protons,
8 neutrons, and 8 electrons
A model of a single
glucose molecule
Particles that are smaller than the atom
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Rice University – All Rights Reserved