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15 Cards in this Set
- Front
- Back
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Which symbol correctly represents an element (D) whose atoms contain 15 protons and 20 neutrons?
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c.) 35/15 D
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What is the ionic charge on the chromium ion in the ionic compound that has the formula Cr2O3?
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a.) 3+
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Which element when combined with chlorine would most likely form an ionic compund?
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a.) lithium
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The correct formula for calcium hydrogen phosphate is:
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a.) CaHPO4
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A cation is any atom or group of atoms with:
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a.) a positive charge
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Compounds that are composed of ions:
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b.) are generally crystalline solids at room temperature.
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A column of elements in the periodic table is known as a:
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c.) group
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A molecular formula:
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c.) shows the number and kinds of atoms in a molecule of a compound
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The metals in Groups 1A, 2A, and 3A:
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D.) lose electrons when they form ions.
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A formula that shows the lowest whole-number ratio of ions in an ionic compound is called a(n);
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d.) formula unit
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The representative particle for nitrogen is;
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b.)a molecule
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What is the molar mass of MgC2?
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b.) 95.3 g
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How many grams are in 6.50 moles of H2SO4?
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a.) 638 g
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Find the number of moles in 3.30 g of (NH4)2SO4?
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d.) 0.0250 mol
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What is the mass of 2.56 x 10^-4 moles of Fe2O3?
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a.) 4.09 x 10-2 g
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