Midterm Review Chapters 7-9
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| How many valence electrons does group 16 elements have? | 6
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| How many valence electrons does group 1 elements have? | 1
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| How many valence electrons does group 13 elements have? | 3
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| How many valence electrons does group 18 elements have? | 8
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| How many valence electrons does group 2 elements have? | 2
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| What is the charge on a group 1 element? | +1
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| What is the charge on a group 2 element? | +2
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| What is the charge on a group 13 element? | +3
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| What is the charge on a group 14 element? | +/- 4
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| What is the charge on a group 15 element? | -3
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| What is the charge of a group 16 element? | -2
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| What is the charge of a group 17 element? | -1
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| What does the octet rule state? | in chemical compounds, atoms tend to have eight electrons in their highest energy level
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| In what kind of bond do oppositely charged ions attract? | ionic bond
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| What is the net charge on NaCl? | 0 (neutral)
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| Name 3 qualities of ionic compounds. | 1. salts 2. composed on anions and cations 3. held togethre by ionic bonds
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| Write the formula for aluminum nitride? | AlN
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| Metals and nonmetals bonded together create what kind of compound? | ionic compounds (metals are cations and nonmetals are anions)
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| In what kind of bond are electrons shared? | covalent
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| In what kind of bond are electrons transferred? | ionic
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| Name the 7 diatomic gases? | hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, and iodine
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| Why do attons share electrons in covalent bonds? | to attain eight electrons in their highest enegy level
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| What so we call a pair of valence electrons that do not participate in bonding? | unshared pair
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| How many dots would be on the lewis dot diagram for Nitrogen? | 5
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| What is the formula for potassium sulfate? | K2SO4
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| What is the formula for magnesium bromide? | MgBr2
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| What is the name of the compound formed from sodium and phosphorus? | sodium phosphide
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| What is the geometric shape of water that explains its polarity? | bent
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| Place these elements in order of increasing electronegativity: Ag, Rb, O | Rb, Ag, O
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| What produces new substances? | a chemical reaction
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| What describes chemical reactions using formulas and symbols? | chemical equations
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| In a chemical equation, where are the reactants found? | to the left of the arrow
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| In a chemical equation, where are the products found? | to the right of the arrow
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| Why do we balance chemical equations? | to satisfy to Law of Conservation of Mass
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| What must be equal on each side in order for a chemical equation to be balanced? | the numbers of atoms of each element
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| What type of reaction is the combination of 2 or more substances to form a compound and has only one product? | combination
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| What type of reaction happens when a compound breaks down into 2 or more simpler substances and has only one reactant? | decomposition
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| What type of reaction happens when one element replaces another in a compound? | single replacement
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| What type of reaction has the ions in two compounds “change partners.” The cation of one compound combines with anion of the other? | double replacement
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ssuriano
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