SPS1(e.): Periodic Trends and Atoms

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Last updated 1:54 PM on 5/29/26
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14 Terms

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periodic table

an arrangement of elements in which the elements are separated into groups based on a set of repeating properties

<p>an arrangement of elements in which the elements are separated into groups based on a set of repeating properties</p>
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Periods

Horizontal rows on the periodic table

<p>Horizontal rows on the periodic table</p>
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groups/families

Vertical columns on the periodic table

<p>Vertical columns on the periodic table</p>
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atomic number

the number of protons in the nucleus of an atom

<p>the number of protons in the nucleus of an atom</p>
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atomic mass

The average mass of all the isotopes of an element. The number of protons and neutrons added together.

<p>The average mass of all the isotopes of an element. The number of protons and neutrons added together.</p>
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atomic symbol

A one or two letter abbreviation for an element

<p>A one or two letter abbreviation for an element</p>
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Protons

positively charged subatomic particles found in an atom's nucleus

<p>positively charged subatomic particles found in an atom's nucleus</p>
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Neutrons

the particles of the nucleus that have no charge

<p>the particles of the nucleus that have no charge</p>
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Electron

A subatomic particle that has a negative charge found outside of an atom's nucleus

<p>A subatomic particle that has a negative charge found outside of an atom's nucleus</p>
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Bohr Model

model of an atom that shows electrons in circular orbits around the nucleus

<p>model of an atom that shows electrons in circular orbits around the nucleus</p>
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valence electrons

Electrons on the outermost energy level of an atom

<p>Electrons on the outermost energy level of an atom</p>
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valence shell

The outermost energy shell of an atom, containing the valence electrons involved in the chemical reactions of that atom.

<p>The outermost energy shell of an atom, containing the valence electrons involved in the chemical reactions of that atom.</p>
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electron cloud

a region around the nucleus of an atom where electrons are likely to be found

<p>a region around the nucleus of an atom where electrons are likely to be found</p>
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energy level

a region of an atom in which electrons of the same energy are likely to be found

<p>a region of an atom in which electrons of the same energy are likely to be found</p>