7.1
Binary Ionic Compound (BIC) -ionic compound made up of two ions
To name cation – use name of atom Na+ = sodium K+ = potassium Ca2+ = calcium Ba2+ = barium
To name anions, use the atom’s base name and –ide at the end
Cl- = Chloride S2- = Sulfide P3- = Phosphide O2- = Oxide KBr = Potassium bromide Mg3N2 = Magnesium nitride
FrF SrBr2
Li2Se
1. Write the symbol and charge of each ion side by side (cation first)
2. If total = 0, just write symbols & you are done!
3. If total does not = 0, criss cross charges to have overall 0 charge
Magnesium sulfide
Rubidium Oxide
Strontium Bromide
Aluminum Oxide
If cation has multiple charges, use a roman numeral to indicate charge
Cu+ =Copper (I) Cu+2 =Copper (II) I = 1 II = 2 III = 3 IV = 4 V = 5 VI= 6 VII = 7 VIII = 8 IX = 9 X = 10
The charge on ionic compounds has to be electrically neutral
Figure out overall charge on anion and then determine what charge cation has to be
CuCl2 ~Each Cl has a charge of -1 (needs 1 e-) and since there are 2 of them, the overall charge of Cl is -2. Cu must be +2 = Copper (II) chloride
PbO2 Charge on O is -2 and there are 2 of them so overall on O is -4.
Pb has to be +4 Lead (IV) oxide
CuO Hg2O Cu2O Vanadium (III) Iodide Platinum (IV) oxide
Polyatomic Ion – an ion made of 2 or more atoms that behave like a single ion
Bonded covalently Bond ionically with other
simple ions as salts
Name the ion that is not a polyatomic like simple cations or anions and then name the polyatomic as the chart says
NaOH = Sodium hydroxide CaCO3 = Calcium carbonate
AlPO3
LiSCN FeSO4
Mn(Cr2O7)2
Determine charge of overall polyatomic and then the other ion.
Follow same rules as before. Beryllium cyanide Copper (II) nitrate
Barium sulfide Potassium oxalate Chromium (III) cyanide Vanadium (V)silicate
Name changes as number of O changes
Gain 1 O = perchlorate ClO4-
Base Name = chlorate ClO3-
Lose 1 O = chlorite ClO2-
Lose 2 O = hypochlorite ClO-
The name usually starts with the word hydrogen, but use mono- and di-
HPO4 –monohydrogen phosphate
H2PO4 – dihydrogen phosphate Thio – replace O with S K2S2O3 – Potassium thiosulfate
Inorganic molecular compounds
Specify # of each type of atom P4O6 – Tetraphosphorus hexoxide
P4O10 – Tetraphosphorus decoxide
MonoMono 11
DiDi 22
TriTri 33
TetraTetra 44
PentaPenta 55
HexaHexa 66
HeptaHepta 77
OctaOcta 88
NonaNona 99
DecaDeca 1010
If there is 1 of the first element, mono is omitted from the word
CO – carbon monoxide CO2 – carbon dioxide
1st element – named 1st – usually least e-neg
2nd element – named 2nd – usually most e-neg – add ide ending
Drop vowels o and a from prefix before adding it to a root that starts with a vowel
N2O4 – Dinitrogen tetroxide SF6 – Sulfur hexafluoride Some common names are
used instead of technical name
H2O – water – not dihydrogen monoxide
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