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15 Cards in this Set
- Front
- Back
Isotopes
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atoms that have the same atomic number, but different mass numbers (most elements have two or more naturally occurring isotopes that contribute to its average atomic mass).
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Molecule
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is the smallest uncharged individual unit of a compound formed by the union of two or more atoms
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Ion
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is a positively or negatively charged atom or group of atoms
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Anions
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negative ions that are formed by the gain of electrons. Cl + 1e- -> Cl-
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The smallest particle of an element than can exist
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atom
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Solid at room temp, high luster, good conductor of heat and electricity, malleable, ductile, high melting point, high density,hemogogenous
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Metals
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No luster, low melting point, poor conductor heat and electricity
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non metals
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Carbon, phosphorus, sulfur, iodine, selenium are?
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Non metals
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Have properties of both metels and non metals
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metalloids
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A distinct substance that contains two or more elements combined in definite proportion by mass
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compound
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2 CLASSES OF COMPOUNDS?
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1-MOLECULAR-composed of two or more elements
2-Ionic-ionic citation with positive charge and anions with negative charge |
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Contain two atoms alike or different
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diatomic molecules
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Shows the symbols and the ratios of atoms for the elements is a chemical compound
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chemical formula
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A positively charged ion
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Cation
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Number that appears partially below the line and to the right of a symbol of an element
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Subscript
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