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Atoms & the Periodic Table Vocab

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Across
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the small, dense center of an atom that houses the protons and neutrons
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smallest component of an element having the chemical properties of the element
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horizontal rows on the periodic table
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the orbitals that hold a specific number of electrons (1st energy level holds 2 electrons, 2nd energy level holds up to 8 electrons, etc)
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the area surrounding the nucleus that houses the electrons
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the number of both protons and neutrons in the nucleus
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table used to organize all elements found on Earth. Elements are organized according to their atomic number, or number of protons. Elements are grouped into groups and periods according to properties.
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an element with a different number of neutrons
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elements on the periodic table that are poor conductors of heat
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vertical columns on the periodic table
Down
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a negatively-charged subatomic particle of the electron cloud; involved in the formation of chemical bonds
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elements on the periodic table that are good conductor of heat and shiny
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a pure substance that cannot be separated into simpler substances by physical or chemical means
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the overall charge of an atom (can be positive or negative)
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the number of protons in the nucleus
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a positively-charged subatomic particle of the nucleus of an atom; contributes to the mass of the atom
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physical theory of the composition of matter common materials are composed of molecules, which are composed of atoms, which are composed of nuclei and electrons.
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elements on the periodic table that have properties of both metals and nonmentals
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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