Árbók Ísafoldar - 01.11.1946, Blaðsíða 72

66
Efnafræði og eðlisfræði
Tákn Frumefni Nr Atóm- þungi Gildi Eðlisþyngd
Ac Aktinium 89 226,0
A1 Aluminium 13 26,97 3 2,54—2,70
Sb Antimon (Stibium) 51 121,76 3—5 6,65
Ar(A) Argon 18 39,944 0 1,38*
As Arsen 33 74,91 3—5 4,71 -5,72
Ba Barium 56 137,36 2 3,80
Bc(Q) Beryllium (Glucinium) 4 9,02 2 1,84
Pb Blý (Plumbum) 82 207,21 2—4 11,35
(RaG) Blý Úranblý — 206,0 —
(ThD) Blý Thoriumblý — 208,0 —
B Bór 5 10,82 3 2,45-2,53
H Vetni (Hydrogenium) 1 1,008 1 0,0695*
Br Bróm 35 79,916 1 3,1893*
Cd Cadmium 48 112,41 2 8,65
Ca Calcium 20 40,08 2 1,42
Cp(Lu) Cassiopeium (Lutecium) 71 174,99 3 —
Ce Cerium 58 140,13 3—4 ca. 7
Cs Cæsium 55 132,91 1 1,87
Dy(Ds) Dysprosium 66 162,46 3 Tl
Em(Nt,Rn) Emanation (Niton, Radon) 86 222,0 0
Er Erbium 68 167,2 3 4,77
Eu Europium 63 152,0 3 — *
F 9 19,00 1 1,31
P Fosfór (Phosphorus) 15 30,98 3-5 1,84—2,20
Gd Gadolinium 64 156,9 3 1,31
Ga Gallium 31 69,72 3 5,96
Ge Germanium 32 72,60 4 5,46
Au Gull (Aurum) 79 197,2 1—3 19,3
Hf(Ct) Hafnium (Celtium) 72 178,6 0 13,3
Me Helium 2 4,003 0 0,137*
Ho Holmium 67 163,5 3 —
11 Illinium 61 — 3
O Ildi (Oxygenium) 8 16,000 2 1,105*
in Indium 49 114,76 3 7,25
Ir Iridium 77 193,1 4 22,4
fe Járn (Ferrnm) 26 55,85 2-3 7,86
J Joð 53 126,92 1 4,95
K 19 39,096 1 0,865
C1 Klór 17 35,457 1 2,49*
Cu Kopar (Cuprum) 29 63,57 1-2
Co Kobolt 27 58,94 2-3
Cr 24 52,01 2-3-6 7,1
Kr Krypton 36 83,7 0 2,818
C Kolefni (Carbonium) 6 12,010 4
Hg Kvikasilfur (Hydrargyrum) 0 200,61 1-2 13,55
N Hyldi (Nitrogenium) 7 14,008 3-5
La Lanthan 57 138,92 3
Li Lithium 3 6,94 1 0,534
Mg Magnium 12 24,32 2 1,70
Mn Mangan 25 54,93 2—3—7
Ma Masurium 43 98,0-99,5 2-3—7 —
Mo Molybdæn 42 95,95 4-6 10,2
Na Natríum 11 22,997 1
Md Neodym 60 144,27 3 6,96
Ne Neon 10 20,183 0 0,674*
Ni Nikkel 28 58,69 2-3 8,6—8,9
Bræðslustig
(Celsius)
658
630
— 189,6
850
1280
327,4
2000-2500
-259
—7,3
320,9
810
640
26,4
-í-71
-233
44,3 (gul)
30,15
960
1063
2600
-272
—227
155
ca. 2400
1530
114
62.5
—101,6
1083
1490
1890
— 169
ca. 4000
-38,9
—210
810
180
650
ca.1250
ca. 2450
97.6
840
—253
1452