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24 Cards in this Set
- Front
- Back
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Atoms
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Smallest piece of matter that retains the chemical properties of the element.
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Nucleus
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Center of the atom- contains the protons and neutrons.
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Amu
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Atomic Mass Unit (1.66 x 1027 kg)
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Ion
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Atom with a charge, resulting from the loss or gain of electrons.
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Anion
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Atm with a negative charge.
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Cation
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Atom with a positive charge.
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Periodic table
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Organizes the elements
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Isotopes
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Atoms of the same element with a different number of neutrons.
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Mass number
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# of protons + # of neutrons.
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Average atomic mass
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Weighted average of the masses of all isotopes of that element.
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Molecules
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Atoms of different elements combined in a definite ratio to form a new unit.
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Polyatomic Ion
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Group of atoms bonded together that have a net charge.
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Binary ionic compound
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Compound containing two elements - one metal (cation) and one non-metal (anion).
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Polyatomic ionic compound
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Compound containit at least one polyatomic ion.
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Multivalent metal
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Metal that can form more than one charge when forming a cation.
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Acid
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donates H+ to water to form hydronium ion (H30+) and anion.
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Electron Cloud
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Area outside nucleus where electrons are located.
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Subshells
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Energy levels of electrons are divided into subshells of equal energy orbitals.
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Orbitals
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Subdivision of subshell. Each orbitan can hold 2 electrons.
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Valence electrons
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the outermost shell
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Isoelectric
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Atoms of different elements with the same electron configuration.
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Protons
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Positive in nucles, 1 amu, determined the identify of the atom.
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Neutrons
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Neutrail, in nucleus, 1 amu, atoms of the same element with a different number of neutrons are isotopes.
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Electrons
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Negative, outside nucleus, 0 amu, electrons can be lost or gained to form an atom with a charge (ion).
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