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15 Cards in this Set
- Front
- Back
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True or False: The nucleus can be changed by chemical processes.
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False. They are unchanged by chemical processes though the atoms can gain or lose electrons.
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What is an ion?
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When an electron is removed or added to a neutral atom.
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What is the name for an atom with positive charge?
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cation
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What is the name for an atom with negative charge?
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anion
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True or False: Nonmetal atoms tend to lose electrons to form cations.
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False. Nonmetals tend to gain electrons to form an anion.
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Between metals and nonmetals, which is more likely to be a cation?
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Metals.
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What are polyatomic ions?
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Ions consisting of atoms joined as a molecule with a net positive or negative charge
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True or False: The behavior of an ion is different from the atom itself.
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True. Although a given atom and its ion may be essentially the same, the behavior of the ion is very different from that of the atom.
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True or False: Members of the noble-gas family such as neon are chemically very nonreactive and form very few compounds.
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True. Their electron arrangement is more stable.
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True or False: Atoms tend to want to gain or lose an electron to fill their valence shell and be more stable.
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True.
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What is an ionic compound?
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A compound that contains both positively and negatively charged ions
EX: Na+ binds with Cl- to make NaCl |
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Which two groups make up ionic compounds: metals, metalloids, or nonmetals?
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Metals and nonmetals make up an ionic compound
Ex: NaCl |
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Are molecular compounds usually made up of metals, metalloids, or nonmetals?
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nonmetals only.
Ex: H2O |
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True or False: Both molecular formulas and empirical formulas can be written for most ionic compounds.
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False. Only empirical formulas can be written for most ionic compounds.
Ex: Nacl |
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Why is it easy to find the empirical formula for an ionic comound if we know the charges of the ions?
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Chemical compounds are always electrically neutral.
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