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Max, Justin, Amy
The word atom comes from the Greek word
meaning “incapable of being divided.”
The definition of atom is: the smallest part of
an element; indivisible by ordinary chemical
Protons: Have a positive charge. +
Neutrons: Uncharged or neutral. +Electrons: Have a negative charge. –
Protons and electrons are equal in strength, and
must be balanced.
Atoms with same charge repel, with opposite
charge attract.
The planetary model of an atom portrays the
atom as a miniature solar system in which the
protons and neutrons are clustered at the
center of the atom in the atomic nucleus.
This modern model of atomic structure, called
the orbital model, has proved to be more useful
in predicting the chemical behavior of atoms.
Marieb, Elaine. “Atomic Structure.” Essentials of
Human Anatomy & Physiology. Serina
Beauparlant. 8th Edition. San Francisco.
Pearson Benjamin Cummings. 2006. 29-30.
“Stock Photography: Orbital model of atom.”
Dreamstime. 22 August 2013. Web.