Cations
Anions (cont.)
NH4+
Sb3+
Sb5+
Ammonium
Antimony III
Antimony V
2+
Carbonate
Bicarbonate
(hydrogen carbonate)
Cyanide
Thiocyanate
CO32HCO3-
Hypochlorite
Chlorite
Chlorate
Perchlorate
ClOClO2ClO3ClO4-
Chromate
Dichromate
CrO42Cr2O72-
Hydroxide
Hydride
OHH-
Hypoiodite
Iodite
Iodate
Periodate
IOIO2IO3IO4-
Imide
Amide
Azide
Nitrite
Nitrate
NH2NH2N3NO2NO3-
Oxalate
Bioxalate
(hydrogen oxalate)
Peroxide
Permanganate
C2O42HC2O4-
PO33PO43HPO42H2PO41-
CNSCN-
Bismuth II
Bismuth III
Bismuth V
Bi
Bi3+
Bi5+
Cadmium
Chromium II (chromous)
Chromium III (chromic)
Cobalt II (cobaltous)
Cobalt III (cobaltic)
Copper I (cuprous)
Copper II (cupric)
Cd2+
Cr2+
Cr3+
Co2+
Co3+
Cu+
Cu2+
Gold I (aurus)
Gold III (auric)
Au+
Au3+
Iron II (ferrous)
Iron III (ferric)
Fe2+
Fe3+
Lead II (plumbous)
Lead IV (plumbic)
Pb2+
Pb4+
Manganese II (manganous)
Manganese III (manganic)
Mercury I (mercurous)
Mercury II (mercuric)
Mn2+
Mn3+
Hg22+
Hg2+
Nickel I
Nickel II (nickelous)
Nickel III
Ni+
Ni2+
Ni3+
Silver
Ag+
Tin II (stannous)
Tin IV (stannic)
Sn2+
Sn4+
Phosphite
Phosphate
(mono) hydrogen phosphate
dihydrogen phosphate
Zinc
Zn2+
Selenate
SeO42-
Silicate
SiO44-
Bisulfide
Sulfite
Sulfate
Bisulfate (hydrogen sulfate)
HSSO32SO42HSO4-
Thiosulfate
S2O32-
Tartrate
C4H4O62-
Anions
Acetate
Arsenate
C2H3O2AsO43-
Borate
BO33-
Hypobromite
Bromite
Bromate
Perbromate
BrOBrO2BrO3BrO4-
O22MnO4-
Period
1
IA
18
VIII A
1
1
atomic # →
2.2
H
2
II A
hydrogen
29
1.9
atomic symbol →
Cu
English element name →
co pper
1.008
3
2
4
helium
4.003
5
2.04
6
2.55
7
3.04
8
3.44
9
3.98
10
Be
B
C
N
O
F
Ne
boron
carbon
nitrogen
oxygen
fluorine
neon
9.012
0.93
12
10.81
Na
Mg
magnesium
3
III B
4
IV B
5
VB
6
VI B
8
VIII B
9
VIII B
10
VIII B
11
IB
12
II B
1
21
1.36
22
1.54
23
1.63
Ca
Sc
Ti
V
potassium
calcium
scandium
titanium
vanadium
39.10
40.08
44.96
47.87
50.94
0.82
38
0.95
39
1.22
40
1.33
41
1.6
Y
Zr
Nb
rubidium
strontium
yttrium
zirconium
niobium
85.47
87.62
88.91
91.22
92.91
0.89
71
1.27
72
1.3
73
1.66
25
1.55
1.83
chromium manganese
42
54.94
2.16
43
1.9
Mo
75
1.91
29
1.9
Cu
iron
cobalt
nickel
55.85
58.93
58.69
45
2.28
Ru
76
2.2
46
2.2
30
1.65
16
19.00
2.58
17
20.18
3.16
18
P
S
Cl
Ar
phosphorus
sulfur
chlorine
argon
28.09
31
1.81
32
30.97
2.01
33
32.07
2.18
34
35.45
2.55
35
39.95
2.96
36
3
Zn
Ga
Ge
As
Se
Br
Kr
copper
zinc
gallium
germanium
arsenic
selenium
bromine
krypton
63.55
65.41
69.72
72.64
74.92
78.96
79.90
47
1.93
48
1.69
49
1.78
In
rhodium
palladium
silver
cadmium
102.9
106.4
107.9
112.4
2.28
16.00
2.19
Si
Cd
78
15
silicon
Ag
2.2
1.9
Al
Pd
77
14.01
14
aluminum
Rh
101.1
1.9
28
Ni
2.2
98
2.36
1.88
Co
molybdenum technetium ruthenium
74
27
Fe
44
Tc
95.94
1.5
26
Mn
52.00
Sr
56
24
Cr
Rb
0.79
1.61
26.98
20
K
55
7
VII B
24.31
0.82
12.01
13
1.31
sodium
37
79
2.54
80
2
50
1.96
51
2.05
52
2.1
53
83.80
2.66
54
2.6
Sn
Sb
Te
I
Xe
indium
tin
antimony
tellurium
iodine
xenon
114.8
118.7
121.8
127.6
126.9
81
1.62
82
2.33
83
2.02
84
2
85
131.3
2.2
86
Cs
Ba
Lu
Hf
Ta
W
Re
Os
Ir
Pt
Au
Hg
Tl
Pb
Bi
Po
At
Rn
cesium
barium
lutetium
hafnium
tantalum
tungsten
rhenium
osmium
iridium
platinum
gold
mercury
thallium
lead
bismuth
polonium
astatine
radon
132.9
87
7
He
17
VII A
beryllium
22.99
6
16
VI A
Li
19
5
15
VA
← atomic mass (rounded)
1.57
6.941
4
14
IV A
lithium
11
3
2
13
III A
63.55
0.98
← electronegativity (Pauling)
137.3
0.7
88
175.0
0.9
Fr
Ra
francium
radium
223
226
Lr
Rf
262
58
1.12
186.2
##
190.2
##
192.2
##
Db
Sg
Bh
Hs
seaborgium
bohrium
hassium
262
266
264
277
59
1.13
60
1.14
61
195.1
##
dubnium
261
1.1
183.8
##
law rencium rutherfordium
62
Mt
200.6
##
Ds
204.4
##
Rg
281
Cn
63
64
272
1.2
66
Uut
209
115
Uuq
284
1.22
209.0
114
Uup
117
Uuh
67
289
1.23
68
288
1.24
69
1.25
Nd
Pm
Sm
Eu
Gd
Tb
Dy
Ho
Er
Tm
Yb
lanthanum
cerium
praseo dymium
neo dymium
pro methium
samarium
euro pium
gado linium
terbium
dyspro sium
ho lmium
erbium
thulium
ytterbium
140.1
90
140.9
1.3
91
144.2
1.5
92
145
1.38
93
150.4
1.36
94
152.0
1.28
95
157.3
1.3
96
158.9
1.3
97
162.5
1.3
98
164.9
1.3
222
118
Uuo
99
167.3
1.3
100
168.9
1.3
101
294
70
Pr
1.1
Uus
292
Ce
138.9
210
116
ununtrium ununquadium ununpentium ununhexium ununseptium ununoctium
285
65
207.2
113
meitnerium darmstadtium roentgentium copernicum
268
1.17
197.0
##
La
89
actinides
180.9
##
57
lanthanides
(rare earth metals)
178.5
##
173.0
1.3
102
1.3
Ac
Th
Pa
U
Np
Pu
Am
Cm
Bk
Cf
Es
Fm
Md
No
actinium
tho rium
pro tactinium
uranium
neptunium
pluto nium
americium
curium
berkelium
califo rnium
einsteinium
fermium
mendelevium
no belium
227
232.0
231.0
238.0
237
239
243
247
247
251
252
257
258
259