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52 Cards in this Set
- Front
- Back
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What occurs in an ionic bond?
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Oppositely charged ions attract.
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What is the net charge of the ionic compound calcium fluoride?
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0
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What is the basis of a metallic bond?
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the attraction of metal ions to mobile electrons
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How many valence electrons does a helium atom have?
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2
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How many valence electrons does a helium atom have?
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5
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What pairs of elements is most likely to form an ionic compound?
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magnesium and fluorine
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What covalent bonds are most polar?
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H---N
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How many valence electrons are in a silicon atom?
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4
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An ionic bond is a bond between __________.
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a cation and an anion
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What is the charge on the cation in the ionic compound sodium sulfide?
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1+
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What particles are free to drift in metals?
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electrons
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What is the name given to the electrons in the highest occupied energy level of an atom?
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valence electrons
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According to VSEPR theory, molecules adjust their shapes to keep which of the following as far apart as possible?
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pairs of valence electrons
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How many valence electrons are in an atom of magnesium?
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2
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A bond fromed between a silicon atom and an oxygen atom is likely to be
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ionic
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What is the charge on the strontium ion?
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2+
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What element does not exist as a diatomic molecule?
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Ne
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a chemical equation that does not indicate relative amounts of reactants and products
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skeleton equation
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a new substance formed in a chemical reaction
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product
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a starting substance in a chemical reaction
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reactant
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a concise representation of a chemical reaction
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chemical equation
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an equation in which each side has the same number of atoms of each element
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balanced equation
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a reaction in which a single compound is broken down into simpler substances
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decomposition reaction
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a reaction in which oxygen reacts with another substance, often producing heat or light
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combustion reaction
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a list of metals in order of decreasing reactivity
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activity series of metals
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Which of the following elements is in the same period as phosphorus?
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magnesium
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The modern periodic table is arranged in order of increasing atomic _________.
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number
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Who arranged the elements according the atomic mass and used the arrangement to predict the properties of missing elements?
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Dmitri Mendeleev
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Which of the following categories includes the majority of the elements?
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metals
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Of the elements Pt, V, Li, and Kr, which is a nonmetal?
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Kr
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To what category of elements does an element belong if it is a poor conductor of electricity?
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nonmetals
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The atomic number of an element is the total number of which particles in the nucleus?
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protons
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Which of the following elements is a transition metal?
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copper
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What is the charge of a cation?
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a positive charge
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What type of ions have names ending in -ide?
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only anions
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How are chemical formulas of binary ionic compounds generally written?
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cation on left, anion on right
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Sulfur hexafluoride is an example of a
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binary compound
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What is the ending for the names of all binary compounds, both ionic and molecular?
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-ide
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Binary molucular compounds are made of two__________.
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nonmetallic elements
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Which of the following correctly shows a prefix used in naming binary molecular compounds with its corresponding number?
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nona-,9
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Chemical reactions
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produce new substances
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Chemical equations
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describe chemical reactions
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Symbols used in equations, together with the explanations of the symbols, are shown below. Which set is correct?
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(aq), dissolved in water
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What is the formula for sodium sulfate?
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A:
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What is the charge on the cation in the ionic compound sodium sulfide?
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1+
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What particles are free to drift in metals?
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electrons
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What is the name given to the electrons in the highest occupied energy level of an atom?
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valence electrons
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According to VSEPR theory, molecules adjust their shapes to keep which of the following as far apart as possible?
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pairs of valence electrons
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How many valence electrons are in an atom of magnesium?
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2
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A bond fromed between a silicon atom and an oxygen atom is likely to be
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ionic
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What is the charge on the strontium ion?
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2+
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?
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A:
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