Valence Electrons and Ionic Compounds - AP Chemistry
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What is the chemical formula for calcium fluoride?
What is the chemical formula for calcium fluoride?
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CaF$_2$. One Ca$^{2+}$ balances two F$^-$ charges.
CaF$_2$. One Ca$^{2+}$ balances two F$^-$ charges.
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What is the charge of an aluminum ion?
What is the charge of an aluminum ion?
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+3. Al loses 3 electrons to achieve octet.
+3. Al loses 3 electrons to achieve octet.
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Which type of bond forms between sodium and chlorine?
Which type of bond forms between sodium and chlorine?
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Ionic bond. Metal transfers electron to nonmetal.
Ionic bond. Metal transfers electron to nonmetal.
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Identify the number of valence electrons in chlorine.
Identify the number of valence electrons in chlorine.
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7 valence electrons. Group 17 elements have 7 valence electrons.
7 valence electrons. Group 17 elements have 7 valence electrons.
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Identify the charge on a sulfide ion.
Identify the charge on a sulfide ion.
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-2. S gains 2 electrons to achieve octet.
-2. S gains 2 electrons to achieve octet.
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What is the valence electron configuration of argon?
What is the valence electron configuration of argon?
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$3s^2 3p^6$. Third shell configuration for argon.
$3s^2 3p^6$. Third shell configuration for argon.
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What is the formula for the compound formed by K and Br?
What is the formula for the compound formed by K and Br?
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KBr. 1:1 ratio balances +1 and -1 charges.
KBr. 1:1 ratio balances +1 and -1 charges.
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What is the electron configuration for a magnesium ion?
What is the electron configuration for a magnesium ion?
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$1s^2 2s^2 2p^6$. Mg$^{2+}$ has same configuration as neon.
$1s^2 2s^2 2p^6$. Mg$^{2+}$ has same configuration as neon.
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What is the charge of a sodium ion?
What is the charge of a sodium ion?
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+1. Na loses 1 electron to achieve stable octet.
+1. Na loses 1 electron to achieve stable octet.
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What is the formula for the compound formed by Ca and Cl?
What is the formula for the compound formed by Ca and Cl?
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CaCl$_2$. One Ca$^{2+}$ balances two Cl$^-$ charges.
CaCl$_2$. One Ca$^{2+}$ balances two Cl$^-$ charges.
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What is the charge on a phosphide ion?
What is the charge on a phosphide ion?
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-3. P gains 3 electrons to achieve octet.
-3. P gains 3 electrons to achieve octet.
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Identify the number of valence electrons in helium.
Identify the number of valence electrons in helium.
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2 valence electrons. Noble gas with complete outer shell.
2 valence electrons. Noble gas with complete outer shell.
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How many electrons does an oxide ion have?
How many electrons does an oxide ion have?
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10 electrons. Neutral O has 8; O$^{2-}$ gains 2 electrons.
10 electrons. Neutral O has 8; O$^{2-}$ gains 2 electrons.
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What is the formula for the compound formed by Na and S?
What is the formula for the compound formed by Na and S?
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Na$_2$S. Two Na$^+$ balance one S$^{2-}$ charge.
Na$_2$S. Two Na$^+$ balance one S$^{2-}$ charge.
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How many valence electrons does carbon have?
How many valence electrons does carbon have?
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4 valence electrons. Group 14 elements have 4 valence electrons.
4 valence electrons. Group 14 elements have 4 valence electrons.
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What charge does a chloride ion have?
What charge does a chloride ion have?
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-1. Cl gains 1 electron to complete octet.
-1. Cl gains 1 electron to complete octet.
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What is the electron configuration of a fluoride ion?
What is the electron configuration of a fluoride ion?
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$1s^2 2s^2 2p^6$. F$^-$ gains electron to match neon configuration.
$1s^2 2s^2 2p^6$. F$^-$ gains electron to match neon configuration.
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How many electrons does a chloride ion have?
How many electrons does a chloride ion have?
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18 electrons. Neutral Cl has 17; Cl$^-$ gains 1 electron.
18 electrons. Neutral Cl has 17; Cl$^-$ gains 1 electron.
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State the number of valence electrons in fluorine.
State the number of valence electrons in fluorine.
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7 valence electrons. Group 17 elements have 7 valence electrons.
7 valence electrons. Group 17 elements have 7 valence electrons.
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How many valence electrons does oxygen have?
How many valence electrons does oxygen have?
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6 valence electrons. Group 16 elements have 6 valence electrons.
6 valence electrons. Group 16 elements have 6 valence electrons.
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What is the formula for the compound formed by K and Br?
What is the formula for the compound formed by K and Br?
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KBr. 1:1 ratio balances +1 and -1 charges.
KBr. 1:1 ratio balances +1 and -1 charges.
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What is the electron configuration for a magnesium ion?
What is the electron configuration for a magnesium ion?
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$1s^2 2s^2 2p^6$. Mg$^{2+}$ has same configuration as neon.
$1s^2 2s^2 2p^6$. Mg$^{2+}$ has same configuration as neon.
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Determine the valence electron count for phosphorus.
Determine the valence electron count for phosphorus.
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5 valence electrons. Group 15 elements have 5 valence electrons.
5 valence electrons. Group 15 elements have 5 valence electrons.
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What is the charge of a sodium ion?
What is the charge of a sodium ion?
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+1. Na loses 1 electron to achieve stable octet.
+1. Na loses 1 electron to achieve stable octet.
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What is the formula for the compound formed by Ca and Cl?
What is the formula for the compound formed by Ca and Cl?
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CaCl$_2$. One Ca$^{2+}$ balances two Cl$^-$ charges.
CaCl$_2$. One Ca$^{2+}$ balances two Cl$^-$ charges.
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What is the typical charge of a barium ion?
What is the typical charge of a barium ion?
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+2. Ba loses 2 electrons for stable configuration.
+2. Ba loses 2 electrons for stable configuration.
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What is the charge on a phosphide ion?
What is the charge on a phosphide ion?
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-3. P gains 3 electrons to achieve octet.
-3. P gains 3 electrons to achieve octet.
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How many valence electrons does argon have?
How many valence electrons does argon have?
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8 valence electrons. Noble gas with complete outer shell.
8 valence electrons. Noble gas with complete outer shell.
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Identify the number of valence electrons in helium.
Identify the number of valence electrons in helium.
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2 valence electrons. Noble gas with complete outer shell.
2 valence electrons. Noble gas with complete outer shell.
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What is the definition of valence electrons?
What is the definition of valence electrons?
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Electrons in the outermost shell of an atom. These determine chemical bonding and reactivity.
Electrons in the outermost shell of an atom. These determine chemical bonding and reactivity.
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