— 209 — Namn, symbol, atomnr [-Atomvikt-] {+Atom- vikt+} Valens i kem. fören. Spec. vikt Isotoper R = renelement * instabil Magnesium, Mg, 12 24,32 II 1,74 24.25 26. Mangan, Mn, 25 54,93 II.III.IV.VI.VII 7,3 R Masurium, Ma, 43 98,0 Molvbden, Mo, 42 95,95 II.III.IV.V.VI 10,2 92.94-98.100. Natrium, Na, 11 22,997 I 0,971 R Neodym, Nd, 60 144,27 III 7,0 142-146.148.150. Neon, Ne, 10 20,183 0 10,90 g/1 20.21.22. Nickel, Ni, 28 58,69 II. (III) 8,9 58.60.61.62.64. Niobium, Nb, 41 92,91 (II).(III).(IV).V 8,56 R Osmium, Os, 76 190,2 (II).(IV).VI.(VII). 22,48 184.186-190.192. Palladium, Pd, 46 106,7 II.(IV) 12,o 102.104.105.106.108.110. Platina, Pt, 78 195,23 II.IV 21,45 192.194.195.196.198. Praseodym, Pr, 59 140,92 III 6,6 R Protaktinium,Pa,91 231 231*234*. Radium, Ra, 88 226,05 II omkr. 6 231*.234*. Radon, Rn, (Em) 86 222 0 9,73 g/1 219*220*222*. Renium, Re, 75 186,31 (III).IV.(V).VI.VII 20,5 185.187. Rhodium, Rh, 45 102,91 III 12,5 R Rubidium, Rb, 37 85,48 I 1,522 85.87*. Rutenium, Ru, 44 101,7 (III).IV.(VI).(VII). (VIII). 12,1 96.98-102.104. Samarium, Sm, 62 150,43 (II).III 7,7 144.147.148* 149* 150 152.154. Selen, Se, 34 78,96 II.IV.VI 4,2-4,8 74.76.77.78.80.82. Silver, Ag, 47 107,880 I(H) 10,5 107.109. Skandium, Sc, 21 45,10 III 4,57 R Strontium, Sr, 38 87,63 II 2,6 84.86.87.88. Svavel, S, 16 32,06 II.IV.VI ombi°^ 2,07 32.33.34.36. ’ monoklmt 1,96 Syre, O, 8 1 6,000 II 1,429 g/1 16.17.18. Tallium, TI, 81 204,39 I.III 11,8 203.205.207*.208*.210*. Tantal, Ta, 73 480,88 (II).(III).(IV).V 16,6 R Tellur, Te, 52 127,61 II.IV.VI 6,2 120.122-126.128.130. Tenn, Sn, 50 118,70 II.IV 7,28 112.114-120.122.124. Terbium, Tb, 65 159,2 III. (IV) R Titan, Ti, 22 47,90 (II).III.IV 4,5 46-50. Torium, Th, 90 232,12 IV 11,2 227*.228*.230*-232*. 234*. Tulium, Tu, 69 169,4 III R Uran, U, 92 238,07 III.IV.V.VI 18,7 234*.235*.237*-239*. Vanadin, V, 23 50.95 II.III.IV.V. 5,688 R Vismut, Bi, 83 209,00 III.(V) 9,8 209.210*-212*.214*. Volfram, W, 74 183,92 II.III.IV.V.VI 19,3 180.182.183.184.186. Väte, H, 1 1,0080 1 0,09 g/1 1.2.3. Xenon, X, 54 131,3 0 5,9 g/1 124.126.128-132.134. 136. Ytterbium. Yb, 70 173,04 (II).III 168.170-174.176. Yttrium, Y, 39 88,93 III R Zink, Zn, 30 65,38 II 6,9-7,2 64.66.67.68.70. Zirkon, Zr, 40 91,22 (II).(III).IV 6,53 90.91.92.94.96.