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22 Cards in this Set
- Front
- Back
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How many protons, neutrons, and electrons in an atom of potassium
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e19,p19,n20
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How many protons, neutrons, and electrons are in carbon-14?
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e6,n8,p6
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define isotope
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variation of an element with different number of neutrons and same number of protons and electrons
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how many protons, neutrons, and electrons are in the chromium iii ion?
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p:24, n:28, e:21
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How many protons, neutrons, and electrons are in sulfide ion?
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e:18, p:16, n:16
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Magnesium-24 has a percent natural abundance of 78.99%, magnesium-25 is 10.0%, magnesium 26 is 11.01%. What is the average atomic mass?
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24.32 grams
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A piece of lead has a mass of 350 mg. If lead-204 has a percent natural abundance of 1.4%, how many atoms of lead-204 are present in the sample?
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1.442 times 10^19
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What is amu? How is it used?
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Atomic Mass Units. 1 amu=1.66054 x 10^-24grams. It is used to express the mass of atoms in a less cumbersome way.
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45 grams of Na =? moles of Na
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1.9 moles of Na
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9.11 x 10^24 atoms of argon =? grams
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604 grams argon
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80 grams of nitrogen is how many moles
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5.7 moles N
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how many groups on the periodic table?
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18
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how many periods on the periodic table?
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7
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name of zigzag line starting between elements 5 and 13?
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amphoteric line/ metalloid line
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where are the metals located?
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they are on the left side and middle excluding hydrogen
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where are the nonmetals located
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non-metals are located to the right of the metalloid line and to the right of the metalloids. Don't forget hydrogen at the top left.
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Give several properties of both metals and non-metals
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metals have high luster and high conductivity of electricity and heat; most solids at room temp.
nonmetals.. at room temp. some are gases and some are solids, and one is liquid. poor conductors of heat and electricity |
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distinguish between an atom and a molecule
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atoms are smallest representative particle of an element and a molecule is the chemical combination of two or more atoms.
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there are two main types of compounds, ionic and covalent. how would you distinguish between them?
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covalent bonds share electrons and ionic bonds transfer electrons. They have different electronegativities.
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what is electrostatic attraction?
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electrostatic attraction is the attraction between atoms of opposite charge that holds them together in ionic bonds.
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how many electrons can be shared in a covalent bond.
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each covalent bond has a pair
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what is a diatomic molecule? which elements are they?
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a diatomic molecule is two atoms of the same element. they are H, Br, I, N, Cl, O, and F
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