نصف قطر تساهمي
نصف القطر الذري:
- نصف القطر الأيوني
- نصف قطر التكافؤ
- نصف القطر الفلزي
- نصف قطر ڤان در ڤالز
نصف القطر التساهمي Covalent radius في الكيمياء، يمثل نصف المسافة بين نواتى ذرتين ، مترابطتين عن طريق رابطة تساهمية . ويتم قياسها عن طريق pm أوÅ .
جدول أنصاف الأقطار التساهمية
| Z | الرمز | r (Å)[3] | r1(Å)[4] | r2(Å)[5] | r3(Å) [6] |
|---|---|---|---|---|---|
| 1 | H | 0.31(5) | 0.32 | ||
| 2 | He | 0.28 | 0.46 | ||
| 3 | Li | 1.28(7) | 1.33 | 1.24 | |
| 4 | Be | 0.96(3) | 1.02 | 0.90 | 0.85 |
| 5 | B | 0.84(3) | 0.85 | 0.78 | 0.73 |
| 6 | C (sp3) | 0.76(1) | 0.75 | ||
| C (sp2) | 0.73(2) | 0.67 | |||
| C (sp) | 0.69(1) | 0.60 | |||
| 7 | N | 0.71(1) | 0.71 | 0.60 | 0.54 |
| 8 | O | 0.66(2) | 0.63 | 0.57 | 0.53 |
| 9 | F | 0.57(3) | 0.64 | 0.59 | 0.53 |
| 10 | Ne | 0.58 | 0.67 | 0.96 | |
| 11 | Na | 1.66(9) | 1.55 | 1.60 | |
| 12 | Mg | 1.41(7) | 1.39 | 1.32 | 1.27 |
| 13 | Al | 1.21(4) | 1.26 | 1.13 | 1.11 |
| 14 | Si | 1.11(2) | 1.16 | 1.07 | 1.02 |
| 15 | P | 1.07(3) | 1.11 | 1.02 | 0.94 |
| 16 | S | 1.05(3) | 1.03 | 0.94 | 0.95 |
| 17 | Cl | 1.02(4) | 0.99 | 0.95 | 0.93 |
| 18 | Ar | 1.06(10) | 0.96 | 1.07 | 0.96 |
| 19 | K | 2.03(12) | 1.96 | 1.93 | |
| 20 | Ca | 1.76(10) | 1.71 | 1.47 | 1.33 |
| 21 | Sc | 1.70(7) | 1.48 | 1.16 | 1.14 |
| 22 | Ti | 1.60(8) | 1.36 | 1.17 | 1.08 |
| 23 | V | 1.53(8) | 1.34 | 1.12 | 1.06 |
| 24 | Cr | 1.39(5) | 1.22 | 1.11 | 1.03 |
| 25 | Mn (low spin) | 1.39(5) | |||
| Mn (high spin) | 1.61(8) | ||||
| Mn | 1.19 | 1.05 | 1.03 | ||
| 26 | Fe (low spin) | 1.32(3) | |||
| Fe (high spin) | 1.52(6) | ||||
| Fe | 1.16 | 1.09 | 1.02 | ||
| 27 | Co (low spin) | 1.26(3) | |||
| Co (high spin) | 1.50(7) | ||||
| Co | 1.11 | 1.03 | 0.96 | ||
| 28 | Ni | 1.24(4) | 1.10 | 1.01 | 1.01 |
| 29 | Cu | 1.32(4) | 1.12 | 1.15 | 1.20 |
| 30 | Zn | 1.22(4) | 1.18 | 1.20 | |
| 31 | Ga | 1.22(3) | 1.24 | 1.17 | 1.21 |
| 32 | Ge | 1.20(4) | 1.21 | 1.11 | 1.14 |
| 33 | As | 1.19(4) | 1.21 | 1.14 | 1.06 |
| 34 | Se | 1.20(4) | 1.16 | 1.07 | 1.07 |
| 35 | Br | 1.20(3) | 1.14 | 1.09 | 1.10 |
| 36 | Kr | 1.16(4) | 1.17 | 1.21 | 1.08 |
| 37 | Rb | 2.20(9) | 2.1 | 2.02 | |
| 38 | Sr | 1.95(10) | 1.85 | 1.57 | 1.39 |
| 39 | Y | 1.90(7) | 1.63 | 1.3 | 1.24 |
| 40 | Zr | 1.75(7) | 1.54 | 1.27 | 1.21 |
| 41 | Nb | 1.64(6) | 1.47 | 1.25 | 1.16 |
| 42 | Mo | 1.54(5) | 1.38 | 1.21 | 1.13 |
| 43 | Tc | 1.47(7) | 1.28 | 1.2 | 1.1 |
| 44 | Ru | 1.46(7) | 1.25 | 1.14 | 1.03 |
| 45 | Rh | 1.42(7) | 1.25 | 1.1 | 1.06 |
| 46 | Pd | 1.39(6) | 1.2 | 1.17 | 1.12 |
| 47 | Ag | 1.45(5) | 1.28 | 1.39 | 1.37 |
| 48 | Cd | 1.44(9) | 1.36 | 1.44 | |
| 49 | In | 1.42(5) | 1.42 | 1.36 | 1.46 |
| 50 | Sn | 1.39(4) | 1.4 | 1.3 | 1.32 |
| 51 | Sb | 1.39(5) | 1.4 | 1.33 | 1.27 |
| 52 | Te | 1.38(4) | 1.36 | 1.28 | 1.21 |
| 53 | I | 1.39(3) | 1.33 | 1.29 | 1.25 |
| 54 | Xe | 1.40(9) | 1.31 | 1.35 | 1.22 |
| 55 | Cs | 2.44(11) | 2.32 | 2.09 | |
| 56 | Ba | 2.15(11) | 1.96 | 1.61 | 1.49 |
| 57 | La | 2.07(8) | 1.8 | 1.39 | 1.39 |
| 58 | Ce | 2.04(9) | 1.63 | 1.37 | 1.31 |
| 59 | Pr | 2.03(7) | 1.76 | 1.38 | 1.28 |
| 60 | Nd | 2.01(6) | 1.74 | 1.37 | |
| 61 | Pm | 1.99 | 1.73 | 1.35 | |
| 62 | Sm | 1.98(8) | 1.72 | 1.34 | |
| 63 | Eu | 1.98(6) | 1.68 | 1.34 | |
| 64 | Gd | 1.96(6) | 1.69 | 1.35 | 1.32 |
| 65 | Tb | 1.94(5) | 1.68 | 1.35 | |
| 66 | Dy | 1.92(7) | 1.67 | 1.33 | |
| 67 | Ho | 1.92(7) | 1.66 | 1.33 | |
| 68 | Er | 1.89(6) | 1.65 | 1.33 | |
| 69 | Tm | 1.90(10) | 1.64 | 1.31 | |
| 70 | Yb | 1.87(8) | 1.7 | 1.29 | |
| 71 | Lu | 1.87(8) | 1.62 | 1.31 | 1.31 |
| 72 | Hf | 1.75(10) | 1.52 | 1.28 | 1.22 |
| 73 | Ta | 1.70(8) | 1.46 | 1.26 | 1.19 |
| 74 | W | 1.62(7) | 1.37 | 1.2 | 1.15 |
| 75 | Re | 1.51(7) | 1.31 | 1.19 | 1.1 |
| 76 | Os | 1.44(4) | 1.29 | 1.16 | 1.09 |
| 77 | Ir | 1.41(6) | 1.22 | 1.15 | 1.07 |
| 78 | Pt | 1.36(5) | 1.23 | 1.12 | 1.1 |
| 79 | Au | 1.36(6) | 1.24 | 1.21 | 1.23 |
| 80 | Hg | 1.32(5) | 1.33 | 1.42 | |
| 81 | Tl | 1.45(7) | 1.44 | 1.42 | 1.5 |
| 82 | Pb | 1.46(5) | 1.44 | 1.35 | 1.37 |
| 83 | Bi | 1.48(4) | 1.51 | 1.41 | 1.35 |
| 84 | Po | 1.40(4) | 1.45 | 1.35 | 1.29 |
| 85 | At | 1.50 | 1.47 | 1.38 | 1.38 |
| 86 | Rn | 1.50 | 1.42 | 1.45 | 1.33 |
| 87 | Fr | 2.60 | 2.23 | 2.18 | |
| 88 | Ra | 2.21(2) | 2.01 | 1.73 | 1.59 |
| 89 | Ac | 2.15 | 1.86 | 1.53 | 1.4 |
| 90 | Th | 2.06(6) | 1.75 | 1.43 | 1.36 |
| 91 | Pa | 2.00 | 1.69 | 1.38 | 1.29 |
| 92 | U | 1.96(7) | 1.7 | 1.34 | 1.18 |
| 93 | Np | 1.90(1) | 1.71 | 1.36 | 1.16 |
| 94 | Pu | 1.87(1) | 1.72 | 1.35 | |
| 95 | Am | 1.80(6) | 1.66 | 1.35 | |
| 96 | Cm | 1.69(3) | 1.66 | 1.36 | |
| 97 | Bk | 1.66 | 1.39 | ||
| 98 | Cf | 1.68 | 1.4 | ||
| 99 | Es | 1.65 | 1.4 | ||
| 100 | Fm | 1.67 | |||
| 101 | Md | 1.73 | 1.39 | ||
| 102 | No | 1.76 | 1.59 | ||
| 103 | Lr | 1.61 | 1.41 | ||
| 104 | Rf | 1.57 | 1.4 | 1.31 | |
| 105 | Db | 1.49 | 1.36 | 1.26 | |
| 106 | Sg | 1.43 | 1.28 | 1.21 | |
| 107 | Bh | 1.41 | 1.28 | 1.19 | |
| 108 | Hs | 1.34 | 1.25 | 1.18 | |
| 109 | Mt | 1.29 | 1.25 | 1.13 | |
| 110 | Ds | 1.28 | 1.16 | 1.12 | |
| 111 | Rg | 1.21 | 1.16 | 1.18 | |
| 112 | Cn | 1.22 | 1.37 | 1.3 | |
| 113 | Uut | 1.36 | |||
| 114 | Uuq | 1.43 | |||
| 115 | Uup | 1.62 | |||
| 116 | Uuh | 1.75 | |||
| 117 | Uus | 1.65 | |||
| 118 | Uuo | 1.57 |
