Atomic Structure

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15 Terms

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Atom

Smallest part of matter

<p>Smallest part of matter</p>
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Nucleus

has a positive charge; center of the atom; contains protons and neutrons

<p>has a positive charge; center of the atom; contains protons and neutrons</p>
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Proton

Positively charged subatomic particle. Found in the nucleus of the atom.

<p>Positively charged subatomic particle. Found in the nucleus of the atom.</p>
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Electron

Negatively charged subatomic particle. Found outside of the nucleus in energy levels. Smallest particle...

<p>Negatively charged subatomic particle. Found outside of the nucleus in energy levels. Smallest particle...</p>
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Neutron

Neutrally charged subatomic particle. Found inside the nucleus of the atom.

<p>Neutrally charged subatomic particle. Found inside the nucleus of the atom.</p>
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Energy Cloud / Energy Level

Space outside the nucleus where electrons orbit.

<p>Space outside the nucleus where electrons orbit.</p>
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Neutral

an atom that has an equal number of protons and electrons

<p>an atom that has an equal number of protons and electrons</p>
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Valence Electron

The electrons in the outer most level. Used in bonding with other atoms.

<p>The electrons in the outer most level. Used in bonding with other atoms.</p>
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Subatomic Particles

The small parts that make up the atom. Protons, electrons, and neutrons.

<p>The small parts that make up the atom. Protons, electrons, and neutrons.</p>
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Atomic Number

Number of protons in the nucleus of an atom.

<p>Number of protons in the nucleus of an atom.</p>
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Atomic Mass

Number of protons and neutrons in an atom.

<p>Number of protons and neutrons in an atom.</p>
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Atomic Mass Unit

A unit of mass that describes the mass of an atom or molecule.

<p>A unit of mass that describes the mass of an atom or molecule.</p>
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Bohr Model

model of the atom in which electrons move rapidly around the nucleus in paths called orbits

<p>model of the atom in which electrons move rapidly around the nucleus in paths called orbits</p>
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Reactivity

How readily a substance combines chemically with other substances.

<p>How readily a substance combines chemically with other substances.</p>
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Physical Property

A characteristic of a pure substance that can be observed without changing it into another substance.

<p>A characteristic of a pure substance that can be observed without changing it into another substance.</p>