Common Ions Chart Page 2
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1
2Common Ions (learn these)
Positive ions (cations)
Negative ions (anions)
+1 Charge
-1 Charge
+
-
ammonium (NH
)
acetate (C
H
O
)
4
2
3
2
+
-
copper (I) or cuprous (Cu
)
cyanide CN
+
-
hydrogen (H
) “proton”
dihydrogen phosphate (H
PO
)
2
4
+
-
silver (Ag
)
hydrogen carbonate or bicarbonate (HCO
)
3
+
-
hydronium ion (H
O
)
hydrogen sulfate of bisulfate (HSO
)
3
4
+
+
+
+
+
+
-
Group 1A cations (Li
, Na
, K
, Rb
, Cs
, Fr
)
hydroxide (OH
)
-
-
nitrate (NO
), nitrite (NO
)
3
2
-
-
-
perchlorate (ClO
),chlorate (ClO
),chlorite (ClO
),
4
3
2
-
hypochlorite (ClO
)
-
permangante (MnO
)
4
-
thiocyanate (SCN
)
-
-
-
-
Group 7A anions (F
, Cl
, Br
, I
) – ide ending
+2 Charge
-2 Charge
2+
2-
cadmium (Cd
)
carbonate (CO
)
3
2+
2-
2-
chromium (II) or chromous (Cr
)
chromate (CrO
), dichromate(Cr
O
)
4
2
7
2+
2-
cobalt(II) or cobaltous (Co
)
hydrogen phosphate (HPO
)
4
2+
2-
copper(II) or cupric (Cu
)
oxalate (C
O
)
2
4
2+
2-
2-
iron(II) or ferrous (Fe
)
oxide (O
), peroxide (O
)
2
2+
2-
2-
lead(II) or plumbous (Pb
)
sulfate (SO
), sulfite (SO
)
4
3
2+
2-
manganese(II) or manganous (Mn
)
sulfide (S
)
2+
2-
2-
2-
2-
mercury(I) or mercurous (Hg
)
Group 6A anions (O
, S
, Se
, Te
) – ide ending
2
2+
mercury(II) or mercuric (Hg
)
2+
nickel (Ni
)
2+
tin(II) or stannous (Sn
)
2+
zinc (Zn
)
2+
2+
2+
2+
2+
2+
Group 2A cations (Be
, Mg
, Ca
, Sr
, Ba
, Ra
)
+3 Charge
-3 Charge
3+
3-
3-
aluminum (Al
)
phosphate (PO
); phosphite (PO
)
4
3
3+
3-
3-
chromium(III) or chromic (Cr
)
Group 7A anions - nitride (N
), phosphide (P
)
3+
iron(III) or ferric (Fe
)
3+
Group 3A cations - aluminum (Al
)
+4 Charge
4+
lead(IV) or plumbic (Pb
)
4+
tin(IV) or stannic (Sn
)
Summary of metal cations with more than one possible charge:
+
2+
2+
2+
2+
3+
2+
3+
2+
3+
2+
3+
2+
4+
2+
4+
Cu
, Cu
; Hg
, Hg
; Co
, Co
; Cr
, Cr
; Fe
, Fe
; Mn
, Mn
; Pb
, Pb
; Sn
, Sn
2
Manganese and some other metals can form several ions with different charges. You should know the ones listed.
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