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28 Cards in this Set
- Front
- Back
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In chemical compounds, covalent bonds form when-
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pairs of electrons are shared between two nonmetal atoms
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the elements that are characterized by having six electrons in the p sublevel belong to which family of elements
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noble gases
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which of these elements contain only three valence electrons:
lithium, boron, scandium, nitrogen |
nitrogen
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In the compound soidum fluoride, NaF, the sodium atom loses one electron and the fluorine atom gains one electron to form ions that have electron configurations similar to:
helium oxygen neon calcium |
neon
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and ion and its parent atom have the same
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electron configuration*****
(bonding test) |
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which of the following is not a property of an ionic compound:
low boiling point brittleness hardness molten compound conducts electricity |
low boiling point
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compared with ionic compounds, molecular compounds have
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have lower melting points
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What is the metallic ion in the compound
cuCl2 |
Cu 2+
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the chemical bond formed when 2 atoms share one or more pairs of electrons is
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a covalent bond
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If two covalently bonded atoms move father apart or closer together than a distance of the bond length, the potential energy of the atoms
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increases
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an electron that occupies the outermost energy level of an atom is known as a ______ ________
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valence electron
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a compound resulting from the formation of an ionic bond between a cation and an anion is a ....
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ionic compound
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in naming a binary ionic compound, the name of the ____ appears first followed by the name of the ____
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metal, nonmetal
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In a covalent bond, shared electrons move within a space called...
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molecular orbital
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a molecule is a neutrally charged group of atoms held together by one or more _______ _______
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covalent bonds
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the bond length is the average distance between the ______ of the ________
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nucleus of the two bonded atoms
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A compound is composed of 85.64% carbon and 14.36% hydrogen. The compoiund has a formula mass of 42.08 grams. What is the molecular formula?
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C3H6
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Determine the empirical formula of a compuond that is 9.2% B and 90.8% Cl
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BCl3
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Pyrazine has the empirical formula C2H2N. Its experimental formula mass (expiremental molar mass) is 80.1 g/mol. What is the molecular formula?
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C4H4N2
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Chlorite
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ClO2-
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How is a covalent bond formed
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a covalent bond is formed when electrons are shared by 2 elements on the molecular orbital
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Describe an experiment to de3termine if a substance is ionic or covalent
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you could take the substance and see what happens when you dissolve it and see if it conducts electricity (ionic)
You cold see if it has a high (ionic) or low (covalent) melting/boiling pts |
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If a student needed to obtain 8.0 mL of a liquid for an experiment, the appropriate piece of laboratory equipment to use would be a --
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10.0 mL graduated cylinder
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in any chemical or physical process, energy is neither created nor destroy =
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law of conservation of energy
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a temperature of 323 K is equivalent to
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50 degrees C
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energy is transferred from hot water to a cup...energy in the form of
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heat
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****In division and multiplication the answer must not have more significant figures than the
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NUMBER IN CALCULATION WITH THE FEWEST SIGNIFICANT FIGURES
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a chemical reaction that releases energy is a _____ _____
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exothermic reaction
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