20 Elements, Common Acids, AND Name of Polyatomic Ions
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Name, Symbol, Preferred Charge, # of Valence Electrons OR Charge and Formula of Polyatomic Ion
Last updated 3:40 PM on 8/27/23
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49 Terms
1
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Hydrogen
H
\+1
1 val. e-
\+1
1 val. e-
2
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Helium
He
NO charge
0 val e- (full shell)
NO charge
0 val e- (full shell)
3
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Lithium
Li
\+1
1 val. e-
\+1
1 val. e-
4
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Beryllium
Be
\+2
2 val. e-
\+2
2 val. e-
5
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Boron
B
\+3
3 val. e-
\+3
3 val. e-
6
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Carbon
C
N/A charge
4 val. e-
N/A charge
4 val. e-
7
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Nitrogen
N
\-3 charge
5 val. e-
\-3 charge
5 val. e-
8
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Oxygen
O
\-2
6 val. e-
\-2
6 val. e-
9
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Fluorine
F
\-1
7 val. e-
\-1
7 val. e-
10
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Neon
Ne
NO charge
0 val. e- (full shell)
NO charge
0 val. e- (full shell)
11
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Sodium
Na
\+1
1 val. e-
\+1
1 val. e-
12
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Magnesium
Mg
\+2
2 val. e-
\+2
2 val. e-
13
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Aluminum
Al
\+3
3 val. e-
\+3
3 val. e-
14
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Silicon
Si
N/A charge
4 val. e-
N/A charge
4 val. e-
15
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Phosphorous
P
\-3
5 val. e-
\-3
5 val. e-
16
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Sulfur
S
\-2
6 val. e-
\-2
6 val. e-
17
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Chlorine
Cl
\-1
7 val. e-
\-1
7 val. e-
18
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Argon
Ar
NO charge
0 val. e- (full shell)
NO charge
0 val. e- (full shell)
19
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Potassium
K
\+1
1 val. e-
\+1
1 val. e-
20
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Calcium
Ca
\+2
2 val. e-
\+2
2 val. e-
21
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Ammonium
+1 cation
NH4
NH4
22
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Acetate
-1 anion
C2H3O2
C2H3O2
23
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Bicarbonate
-1 anion
HCO3
HCO3
24
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Hypochlorite
-1 anion
ClO
ClO
25
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Chlorite
-1 anion
ClO2
ClO2
26
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Chlorate
-1 anion
ClO3
ClO3
27
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Perchlorate
-1 anion
ClO4
ClO4
28
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Cyanide
-1 anion
CN
CN
29
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Hydroxide
-1 anion
OH
OH
30
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Nitrite
-1 anion
NO2
NO2
31
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Nitrate
-1 anion
NO3
NO3
32
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Permanganate
-1 anion
MnO4
MnO4
33
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Thiocynate
-1 anion
SCN
SCN
34
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Carbonate
-2 anion
CO3
CO3
35
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Chromate
-2 anion
CrO4
CrO4
36
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Dichromate
-2 anion
Cr2O7
Cr2O7
37
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Sulfite
-2 anion
SO3
SO3
38
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Sulfate
-2 anion
SO4
SO4
39
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Phosphite
\-3 anion
PO3
PO3
40
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Phosphate
\-3 anion
PO4
PO4
41
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Hydrochloric Acid
HCl
strong
strong
42
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Sulfuric Acid
H2SO4
strong
strong
43
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Nitric Acid
HNO3
strong
strong
44
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Carbonic Acid
H2CO3
weak
weak
45
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Hydrobromic Acid
HBr
strong
strong
46
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Hydroiodic Acid
HI
strong
strong
47
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Perchloric Acid
HClO4
strong
strong
48
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Chloric Acid
HClO3
49
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Phosphoric Acid
H3PO4
weak
weak
Note 
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