Cesium
From Conservapedia | Cesium | |
|---|---|
| Properties | |
| Atomic symbol | Cs |
| Atomic number | 55 |
| Classification | alkali metal |
| Atomic mass | 132.9 amu |
| Other Information | |
| Date of discovery | 1860 |
| Name of discoverer | Bunsen, R.W. and Kirchoff, G. |
| Name origin | From the Latin Caesius, meaning "sky blue" |
| Uses | removing air traces in vacuum tubes |
| Obtained from | lepidolite, pollucite |
Cesium is an element[1] in the alkali metal class of the periodic table. It is so chemically active that it is never found free (in elemental form) in nature, and catches fire on mere exposure to air and almost explodes on contact with water.
Cesium is a key component in atomic clocks.[2]
It was discovered by Robert Bunsen and Gustav Kirchoff, using their newly invented spectroscope, and was the first element to be discovered spectroscopically. It (along with rubidium) was identified by a previously unseen blue spectral line in the analysis of mineral water from a German spa. The name comes from that color.
References[edit]
- ↑ Wile, Dr. Jay L. Exploring Creation With Physical Science. Apologia Educational Ministries, Inc. 1999, 2000
- ↑ http://physicsworld.com/cws/article/news/25595
| 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: [Metals] [Elements]
↧ Download as ZWI file | Last modified: 02/08/2023 07:04:58 | 15 views
☰ Source: https://www.conservapedia.com/Cesium | License: CC BY-SA 3.0
ZWI signed:
ZWI viewer
by the 
KSF
KSF