transition and polyatomic ions 2008
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![Page 1: Transition And Polyatomic Ions 2008](https://reader034.vdocuments.mx/reader034/viewer/2022042515/548297995806b5de048b46be/html5/thumbnails/1.jpg)
Transition Metals & Polyatomic Ions
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Goal 1
Name ionic compounds that contain transition metals
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• Transition Metals– Total charge on compound = 0– Electron loss can vary– Roman numerals
• Indicate charge
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• Step 1: Determine total charge on nonmetal
MnO O = 2-
Fe2S3 S3 = 6-
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• Step 2: Determine needed charge on transition metal to create an equal opposite charge (multiply by subscript)
MnO Mn = 2+ O = 2-
Fe2S3 Fe = 3+ S3 = 6-
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• Step 3: Use charge on transition metal to determine your roman numeral
MnO Mn = 2+ O = 2-
manganese(II) oxide
Fe2S3 Fe = 3+ S3 = 6-
iron(III) sulfide
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• Try it backwards!
• Chemical formula from a name
Tin(II) oxide
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• Step 1: Determine charge on transition metal
Tin(II) oxide
Sn = 2+
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• Step 2: Determine charge on nonmetal ion
(use periodic table)
Tin(II) oxide
Sn = 2+ O = 2-
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• Step 3: Determine how many of each needed to equal 0 charge (CC&R)
Tin(II) oxide
Sn = 2+ O = 2-
SnO
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Try it…
Iron(III) fluoride
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Were you correct?
Iron(III) fluoride
FeFl3
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Try again (this time backwards)
TiN
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Were you correct?
TiN
titanium(III) nitride
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And again…
PbO2
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Were you correct?
PbO2
lead(IV) oxide
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Goal 2
Name ionic compounds using polyatomic ions
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• Polyatomic ions– Covalently bonded elements with a charge– May be indicated by parentheses
(OH-)
(OH-)2
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– Use the same as a single ion– Information found on back of periodic table
Hydroxide ion
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• Step 1: recognize use of polyatomic ion– Name ends in “-ate” or “-ite” – Name that is not an element… cyanide– Parentheses used in chemical formula– Or… check anyways
Sodium sulfate
Na2(SO4)
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• Step 2: use back of your periodic table to determine charge on the polyatomic ion
Sodium sulfate2-
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• Step 3: determine how many metal ions needed to make a 0 charge (criss-cross)
Sodium1+2 sulfate2-
Na2(SO4)
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Try it….
Calcium chlorate
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Try it….
Calcium chlorate
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Try it….
Calcium chlorate1-
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Try it….
Calcium2+ chlorate1-2
Ca(ClO3)2
CC&R stays OUTSIDE of polyatomic parentheses