Summary table of mean ocean concentrations and residence times
Summary table of mean ocean concentrations and residence times. See the page of each element for references.
The concentration generally decreases with increasing atomic number.
The residence time is generally longer for elements with higher concentrations.
Atomic # |
Element |
Mean Ocean |
Atomic Mass |
Mean Ocean |
Mean Ocean |
UNIT |
Residence Time |
Conc. |
Conc. |
Conc |
yrs |
||||
ng/kg |
g/mol |
nmol/kg |
Rational Units |
||||
1 |
H+ |
1.20E+01 |
12 |
nmol/kg |
|||
2 |
He |
7.60E+00 |
4.0026 |
1.90E+00 |
1.9 |
nmol/kg |
|
3 |
Li |
1.80E+05 |
6.9410 |
2.59E+04 |
25.9 |
µmol/kg |
2,800,000 |
4 |
Be |
2.10E-01 |
9.0122 |
2.33E-02 |
23 |
pmol/kg |
1,000 |
5 |
B |
4.50E+06 |
10.8110 |
4.16E+05 |
416 |
µmol/kg |
9,600,000 |
6 |
C |
2.70E+07 |
12.0110 |
2.25E+06 |
2.248 |
mmol/kg |
83,000 |
7 |
N2 |
8.30E+06 |
14.0067 |
5.93E+05 |
590 |
µmol/kg |
|
7 |
NO3 |
4.20E+05 |
14.0067 |
3.00E+04 |
30 |
µmol/kg |
3,000 |
8 |
O2 |
2.80E+06 |
15.9994 |
1.75E+05 |
175 |
µmol/kg |
|
9 |
F |
1.30E+06 |
18.9984 |
6.84E+04 |
68 |
µmol/kg |
500,000 |
10 |
Ne |
1.60E+02 |
20.1797 |
7.93E+00 |
7.9 |
nmol/kg |
|
11 |
Na |
1.08E+10 |
22.9898 |
4.69E+08 |
469 |
mmol/kg |
55,000,000 |
12 |
Mg |
1.28E+09 |
24.3050 |
5.27E+07 |
52.7 |
mmol/kg |
13,000,000 |
13 |
Al |
3.00E+01 |
26.9815 |
1.11E+00 |
1.11 |
nmol/kg |
200 |
14 |
Si |
2.80E+06 |
28.0855 |
9.97E+04 |
99.7 |
µmol/kg |
20,000 |
15 |
PO4 |
6.20E+04 |
30.9738 |
2.00E+03 |
2 |
µmol/kg |
69,000 |
16 |
SO4– |
8.98E+08 |
32.0660 |
2.80E+07 |
28 |
mmol/kg |
8,700,000 |
17 |
Cl- |
1.94E+10 |
35.4527 |
5.46E+08 |
546 |
mmol/kg |
87,000,000 |
18 |
Ar |
6.20E+05 |
39.9480 |
1.55E+04 |
15.5 |
µmol/kg |
|
19 |
K |
3.99E+08 |
39.0983 |
1.02E+07 |
10.2 |
mmol/kg |
12,000,000 |
20 |
Ca |
4.12E+08 |
40.0780 |
1.03E+07 |
10.27 |
mmol/kg |
1,100,000 |
21 |
Sc |
7.00E-01 |
44.9559 |
1.56E-02 |
16 |
pmol/kg |
|
22 |
Ti |
6.50E+00 |
47.8800 |
1.36E-01 |
136 |
pmol/kg |
150 |
23 |
V |
2.00E+03 |
50.9415 |
3.93E+01 |
39 |
nmol/kg |
50,000 |
24 |
Cr(VI) |
2.10E+02 |
51.9960 |
4.04E+00 |
4 |
nmol/kg |
8,000 |
25 |
Mn |
2.00E+01 |
54.9380 |
3.64E-01 |
360 |
pmol/kg |
60 |
26 |
Fe |
3.00E+01 |
55.8470 |
5.37E-01 |
540 |
pmol/kg |
500 |
27 |
Co |
1.20E+00 |
58.9332 |
2.04E-02 |
20 |
pmol/kg |
340 |
28 |
Ni |
4.80E+02 |
58.6934 |
8.18E+00 |
8.2 |
nmol/kg |
6,000 |
29 |
Cu |
1.50E+02 |
63.5460 |
2.36E+00 |
2.4 |
nmol/kg |
5,000 |
30 |
Zn |
3.50E+02 |
65.3900 |
5.35E+00 |
5.4 |
nmol/kg |
50,000 |
31 |
Ga |
1.20E+00 |
69.7230 |
1.72E-02 |
17 |
pmol/kg |
500 |
32 |
Ge |
5.50E+00 |
72.6100 |
7.57E-02 |
75 |
pmol/kg |
20,000 |
33 |
As |
1.20E+03 |
74.9216 |
2.00E+01 |
20 |
nmol/kg |
39,000 |
34 |
Se |
1.55E+02 |
78.9600 |
1.96E+00 |
1.9 |
nmol/kg |
26,000 |
35 |
Br |
6.70E+07 |
79.9040 |
8.39E+05 |
840 |
µmol/kg |
130,000,000 |
36 |
Kr |
3.10E+02 |
83.8000 |
3.70E+00 |
3.7 |
nmol/kg |
|
37 |
Rb |
1.20E+05 |
85.4678 |
1.40E+03 |
1.4 |
µmol/kg |
3,000,000 |
38 |
Sr |
7.80E+06 |
87.6200 |
8.90E+04 |
89 |
µmol/kg |
5,100,000 |
39 |
Y |
1.70E+01 |
88.9059 |
1.91E-01 |
190 |
pmol/kg |
5,100 |
40 |
Zr |
1.50E+01 |
91.2240 |
1.64E-01 |
160 |
pmol/kg |
5,600 |
41 |
Nb |
5.00E+00 |
92.9064 |
5.38E-02 |
3.8 |
pmol/kg |
|
42 |
Mo |
1.00E+04 |
95.9400 |
1.04E+02 |
100 |
nmol/kg |
760,000 |
43 |
Tc |
||||||
44 |
Ru |
5.00E-03 |
101.0700 |
4.95E-05 |
<49 |
fmol/kg |
|
45 |
Rh |
8.00E-02 |
102.9055 |
7.77E-04 |
780 |
fmol/kg |
|
46 |
Pd |
6.00E-02 |
106.4200 |
5.64E-04 |
560 |
fmol/kg |
10,000 |
47 |
Ag |
2.00E+00 |
107.8680 |
1.85E-02 |
18 |
pmol/kg |
|
48 |
Cd |
7.00E+01 |
112.4100 |
6.23E-01 |
620 |
pmol/kg |
50,000 |
49 |
In |
1.00E-02 |
114.8200 |
8.71E-05 |
87 |
fmol/kg |
100 |
50 |
Sn |
5.00E-01 |
118.7100 |
4.21E-03 |
4.2 |
pmol/kg |
4 |
51 |
Sb |
2.00E+02 |
121.7570 |
1.64E+00 |
1.6 |
nmol/kg |
5,700 |
52 |
Te |
7.00E-02 |
127.6000 |
5.49E-04 |
550 |
fmol/kg |
100 |
53 |
I |
5.80E+04 |
126.9045 |
4.57E+02 |
460 |
nmol/kg |
340,000 |
54 |
Xe |
6.60E+01 |
131.2900 |
5.03E-01 |
500 |
pmol/kg |
|
55 |
Cs |
3.06E+02 |
132.9054 |
2.30E+00 |
2.3 |
nmol/kg |
330,000 |
56 |
Ba |
1.50E+04 |
137.3300 |
1.09E+02 |
109 |
nmol/kg |
10,000 |
57 |
La |
5.60E+00 |
138.9055 |
4.03E-02 |
40 |
pmol/kg |
1,000 |
58 |
Ce |
7.00E-01 |
140.1200 |
5.00E-03 |
5 |
pmol/kg |
100 |
59 |
Pr |
7.00E-01 |
140.9077 |
4.97E-03 |
5 |
pmol/kg |
500 |
60 |
Nd |
3.30E+00 |
144.2400 |
2.29E-02 |
23 |
pmol/kg |
600 |
61 |
Pm |
||||||
62 |
Sm |
5.70E-01 |
150.3600 |
3.79E-03 |
3.8 |
pmol/kg |
700 |
63 |
Eu |
1.70E-01 |
151.9650 |
1.12E-03 |
1.1 |
pmol/kg |
600 |
64 |
Gd |
9.00E-01 |
157.2500 |
5.72E-03 |
5.7 |
pmol/kg |
800 |
65 |
Tb |
1.70E-01 |
158.9253 |
1.07E-03 |
1.1 |
pmol/kg |
800 |
66 |
Dy |
1.10E+00 |
162.5000 |
6.77E-03 |
6.8 |
pmol/kg |
1,000 |
67 |
Ho |
3.60E-01 |
164.9303 |
2.18E-03 |
2.2 |
pmol/kg |
2,700 |
68 |
Er |
1.20E+00 |
167.2600 |
7.17E-03 |
7.2 |
pmol/kg |
2,700 |
69 |
Tm |
2.00E-01 |
168.9342 |
1.18E-03 |
1.2 |
pmol/kg |
5,000 |
70 |
Yb |
1.20E+00 |
173.0400 |
6.93E-03 |
6.9 |
pmol/kg |
2,200 |
71 |
Lu |
2.30E-01 |
174.9670 |
1.31E-03 |
1.3 |
pmol/kg |
6,200 |
72 |
Hf |
3.40E+00 |
178.4900 |
1.90E-02 |
0.71 |
pmol/kg |
1,300 |
73 |
Ta |
2.50E+00 |
180.9479 |
1.38E-02 |
0.2 |
pmol/kg |
|
74 |
W |
1.00E+01 |
183.8500 |
5.44E-02 |
54 |
pmol/kg |
61,000 |
75 |
Re |
7.80E+00 |
186.2070 |
4.19E-02 |
41 |
pmol/kg |
|
76 |
Os |
2.00E-03 |
190.2000 |
1.05E-05 |
56 |
fmol/kg |
40,000 |
77 |
Ir |
1.30E-04 |
192.2200 |
6.76E-07 |
680 |
amol/kg |
2,000 |
78 |
Pt |
5.00E-02 |
195.0800 |
2.56E-04 |
250 |
fmol/kg |
|
79 |
Au |
9.85E-03 |
196.9665 |
5.00E-05 |
50 |
fmol/kg |
380 |
80 |
Hg |
1.40E-01 |
200.5900 |
6.98E-04 |
700 |
fmol/kg |
350 |
81 |
Tl |
1.30E+01 |
204.3830 |
6.36E-02 |
64 |
pmol/kg |
|
82 |
Pb |
2.70E+00 |
207.2000 |
1.30E-02 |
13 |
pmol/kg |
80 |
83 |
Bi |
3.00E-02 |
208.9804 |
1.44E-04 |
140 |
fmol/kg |
|
84 |
Po |
3.00E-11 |
30 |
zmol/kg |
100 |
||
85 |
At |
||||||
86 |
Rn |
3.00E-12 |
3 |
zmol/kg |
0.01 |
||
87 |
Fr |
||||||
88 |
Ra |
1.30E-04 |
226.0254 |
5.75E-07 |
580 |
amol/kg |
|
89 |
Ac |
2.00E-11 |
20 |
zmol/kg |
|||
90 |
Th |
2.00E-02 |
232.0381 |
8.62E-05 |
90 |
fmol/kg |
45 |
91 |
Pa |
231.0359 |
1.80E-08 |
18 |
amol/kg |
200 |
|
92 |
U |
3.20E+03 |
238.0290 |
1.34E+01 |
13.4 |
nmol/kg |
400,000 |