Manganese
From Conservapedia | Manganese | |
|---|---|
| Properties | |
| Atomic symbol | Mn |
| Atomic number | 25 |
| Classification | Transition metal |
| Atomic mass | 54.938 amu |
| Number of Stable Isotopes | 1 |
| Density (grams per cc) | 7.440 g/cm^3 |
| Other Information | |
| Date of discovery | 1774 |
| Name of discoverer | Johann Gahn |
| Name origin | From the Latin word mangnes (magnet) |
| Uses | Steel, batteries, ceramics, coins, fertilizer and animal feed additives |
| Obtained from | Pyrolusite, psilomelane, cryptomelane, manganite, rhodochrosite |
Manganese is an element in the "transition metals" class of the periodic table. It is hard and brittle. It reacts (slowly) with water, and with acids.
Manganese was discovered by Johann Gahn in 1774 by heating pyrolusite with charcoal in a blast furnace.
Manganese is used in small amounts to change the propeties of steel and other useful alloys.
It is remarkable in all the other metals in that it is formed by the radioactive breakdown of magnesium isotopes, yet is still found in sufficient quantities to be useful in common, everyday processes and materials. Manganese is found in pyrolusite (magnesium) ore along with magnesium, and the two are separated in a process similar to that of iron in a blast furnace, due to their significantly different melting points (one melts and is tapped off while the other remains solid; this is then melted and tapped off). It can also be found in pure manganese ore, where all the magnesium has decomposed. These deposits, however, are scarce.
| Periodic Table of the Elements | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | |||||||
1
H 1.008 |
2
He 4.003 | |||||||||||||||||||||||
3
Li 6.939 |
4
Be 9.0122 |
5
B 10.811 |
6
C 12.011 |
7
N 14.007 |
8
O 15.999 |
9
F 18.998 |
10
Ne 10.183 | |||||||||||||||||
11
Na 22.99 |
12
Mg 24.312 |
13
Al 26.982 |
14
Si 28.086 |
15
P 30.974 |
16
S 32.064 |
17
Cl 35.453 |
18
Ar 39.948 | |||||||||||||||||
19
K 39.102 |
20
Ca 40.08 |
21
Sc 44.956 |
22
Ti 47.9 |
23
V 50.942 |
24
Cr 51.996 |
25
Mn 54.938 |
26
Fe 55.847 |
27
Co 58.933 |
28
Ni 58.71 |
29
Cu 63.546 |
30
Zn 65.37 |
31
Ga 69.72 |
32
Ge 72.59 |
33
As 74.922 |
34
Se 78.96 |
35
Br 79.904 |
36
Kr 83.8 | |||||||
37
Rb 85.47 |
38
Sr 87.62 |
39
Y 88.905 |
40
Zr 91.22 |
41
Nb 92.906 |
42
Mo 95.94 |
43
Tc [97] |
44
Ru 101.07 |
45
Rh 102.91 |
46
Pd 106.4 |
47
Ag 107.87 |
48
Cd 112.4 |
49
In 114.82 |
50
Sn 118.69 |
51
Sb 121.75 |
52
Te 127.6 |
53
I 126.9 |
54
Xe 131.3 | |||||||
55
Cs 132.91 |
56
Ba 137.34 |
57*
La 138.91 |
72
Hf 178.49 |
73
Ta 180.95 |
74
W 183.85 |
75
Re 186.2 |
76
Os 190.2 |
77
Ir 192.2 |
78
Pt 195.09 |
79
Au 196.97 |
80
Hg 200.59 |
81
Tl 204.37 |
82
Pb 207.19 |
83
Bi 208.98 |
84
Po 210 |
85
At 210 |
86
Rn 222 | |||||||
87
Fr 215 |
88
Ra 226.03 |
89**
Ac 227.03 |
104
Rf [261] |
105
Db [262] |
106
Sg [266] |
107
Bh [264] |
108
Hs [265] |
109
Mt [268] |
110
Dt [271] |
111
Rg [272] |
112
Cn [277] |
113
Nh [284] |
114
Fv [289] |
115
Mc [288] |
116
Lv [292] |
117
Ts [293] |
118
Og [294] |
|||||||
| *Lanthanides | 58
Ce 140.12 |
59
Pr 140.91 |
60
Nd 144.24 |
61
Pm 145 |
62
Sm 150.35 |
63
Eu 151.96 |
64
Gd 157.25 |
65
Tb 158.92 |
66
Dy 162.5 |
67
Ho 164.93 |
68
Er 167.26 |
69
Tm 168.93 |
70
Yb 173.04 |
71
Lu 174.97 |
||||||||||
| **Actinides | 90
Th 232.04 |
91
Pa 231 |
92
U 238.03 |
93
Np 237.05 |
94
Pu 239.05 |
95
Am 241.06 |
96
Cm 244.06 |
97
Bk 249.08 |
98
Cf 252.08 |
99
Es 252.08 |
100
Fm 257.1 |
101
Md 258.1 |
102
No 259.1 |
103
Lr 262.11 |
||||||||||
Categories: [Elements] [Metals]
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