Muatan inti efektif
Nilai

Berikut adalah nilai konstanta screening terkini yang disediakan oleh Clementi dkk.
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
|   | H |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | He |
| Z | 1 |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | 2 |
| 1s | 1.000 |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   | 1.688 |
|   | Li | Be |   |   |   |   |   |   |   |   |   |   | B | C | N | O | F | Ne |
| Z | 3 | 4 |   |   |   |   |   |   |   |   |   |   | 5 | 6 | 7 | 8 | 9 | 10 |
| 1s | 2.691 | 3.685 |   |   |   |   |   |   |   |   |   |   | 4.680 | 5.673 | 6.665 | 7.658 | 8.650 | 9.642 |
| 2s | 1.279 | 1.912 |   |   |   |   |   |   |   |   |   |   | 2.576 | 3.217 | 3.847 | 4.492 | 5.128 | 5.758 |
| 2p |   |   |   |   |   |   |   |   |   |   |   |   | 2.421 | 3.136 | 3.834 | 4.453 | 5.100 | 5.758 |
|   | Na | Mg |   |   |   |   |   |   |   |   |   |   | Al | Si | P | S | Cl | Ar |
| Z | 11 | 12 |   |   |   |   |   |   |   |   |   |   | 13 | 14 | 15 | 16 | 17 | 18 |
| 1s | 10.626 | 11.609 |  |  |  |  |  |  |  |  |  |  | 12.591 | 13.575 | 14.558 | 15.541 | 16.524 | 17.508 |
| 2s | 6.571 | 7.392 |  |  |  |  |  |  |  |  |  |  | 8.214 | 9.020 | 9.825 | 10.629 | 11.430 | 12.230 |
| 2p | 6.802 | 7.826 |  |  |  |  |  |  |  |  |  |  | 8.963 | 9.945 | 10.961 | 11.977 | 12.993 | 14.008 |
| 3s | 2.507 | 3.308 |  |  |  |  |  |  |  |  |  |  | 4.117 | 4.903 | 5.642 | 6.367 | 7.068 | 7.757 |
| 3p |  |  |  |  |  |  |  |  |  |  |  |  | 4.066 | 4.285 | 4.886 | 5.482 | 6.116 | 6.764 |
|   | K | Ca | Sc | Ti | V | Cr | Mn | Fe | Co | Ni | Cu | Zn | Ga | Ge | As | Se | Br | Kr |
| Z | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 |
| 1s | 18.490 | 19.473 | 20.457 | 21.441 | 22.426 | 23.414 | 24.396 | 25.381 | 26.367 | 27.353 | 28.339 | 29.325 | 30.309 | 31.294 | 32.278 | 33.262 | 34.247 | 35.232 |
| 2s | 13.006 | 13.776 | 14.574 | 15.377 | 16.181 | 16.984 | 17.794 | 18.599 | 19.405 | 20.213 | 21.020 | 21.828 | 22.599 | 23.365 | 24.127 | 24.888 | 25.643 | 26.398 |
| 2p | 15.027 | 16.041 | 17.055 | 18.065 | 19.073 | 20.075 | 21.084 | 22.089 | 23.092 | 24.095 | 25.097 | 26.098 | 27.091 | 28.082 | 29.074 | 30.065 | 31.056 | 26.047 |
| 3s | 8.680 | 9.602 | 10.340 | 11.033 | 11.709 | 12.368 | 13.018 | 13.676 | 14.322 | 14.961 | 15.594 | 16.219 | 16.996 | 17.790 | 18.596 | 19.403 | 20.219 | 21.033 |
| 3p | 7.726 | 8.658 | 9.406 | 10.104 | 10.785 | 11.466 | 12.109 | 12.778 | 13.435 | 14.085 | 14.731 | 15.369 | 16.204 | 17.014 | 17.850 | 18.705 | 19.571 | 20.434 |
| 4s | 3.495 | 4.398 | 4.632 | 4.817 | 4.981 | 5.133 | 5.283 | 5.434 | 5.576 | 5.711 | 5.842 | 5.965 | 7.067 | 8.044 | 8.944 | 9.758 | 10.553 | 11.316 |
| 3d |  |  | 7.120 | 8.141 | 8.983 | 9.757 | 10.528 | 11.180 | 11.855 | 12.530 | 13.201 | 13.878 | 15.093 | 16.251 | 17.378 | 18.477 | 19.559 | 20.626 |
| 4p |   |   |   |   |   |   |   |   |   |   |   |   | 6.222 | 6.780 | 7.449 | 8.287 | 9.028 | 9.338 |
|   | Rb | Sr | Y | Zr | Nb | Mo | Tc | Ru | Rh | Pd | Ag | Cd | In | Sn | Sb | Te | I | Xe |
| Z | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 |
| 1s | 36.208 | 37.191 | 38.176 | 39.159 | 40.142 | 41.126 | 42.109 | 43.092 | 44.076 | 45.059 | 46.042 | 47.026 | 48.010 | 48.992 | 49.974 | 50.957 | 51.939 | 52.922 |
| 2s | 27.157 | 27.902 | 28.622 | 29.374 | 30.125 | 30.877 | 31.628 | 32.380 | 33.155 | 33.883 | 34.634 | 35.386 | 36.124 | 36.859 | 37.595 | 38.331 | 39.067 | 39.803 |
| 2p | 33.039 | 34.030 | 35.003 | 35.993 | 36.982 | 37.972 | 38.941 | 39.951 | 40.940 | 41.930 | 42.919 | 43.909 | 44.898 | 45.885 | 46.873 | 47.860 | 48.847 | 49.835 |
| 3s | 21.843 | 22.664 | 23.552 | 24.362 | 25.172 | 25.982 | 26.792 | 27.601 | 28.439 | 29.221 | 30.031 | 30.841 | 31.631 | 32.420 | 33.209 | 33.998 | 34.787 | 35.576 |
| 3p | 21.303 | 22.168 | 23.093 | 23.846 | 24.616 | 25.474 | 26.384 | 27.221 | 28.154 | 29.020 | 29.809 | 30.692 | 31.521 | 32.353 | 33.184 | 34.009 | 34.841 | 35.668 |
| 4s | 12.388 | 13.444 | 14.264 | 14.902 | 15.283 | 16.096 | 17.198 | 17.656 | 18.582 | 18.986 | 19.865 | 20.869 | 21.761 | 22.658 | 23.544 | 24.408 | 25.297 | 26.173 |
| 3d | 21.679 | 22.726 | 25.397 | 25.567 | 26.247 | 27.228 | 28.353 | 29.359 | 30.405 | 31.451 | 32.540 | 33.607 | 34.678 | 35.742 | 36.800 | 37.839 | 38.901 | 39.947 |
| 4p | 10.881 | 11.932 | 12.746 | 13.460 | 14.084 | 14.977 | 15.811 | 16.435 | 17.140 | 17.723 | 18.562 | 19.411 | 20.369 | 21.265 | 22.181 | 23.122 | 24.030 | 24.957 |
| 5s | 4.985 | 6.071 | 6.256 | 6.446 | 5.921 | 6.106 | 7.227 | 6.485 | 6.640 | (empty) | 6.756 | 8.192 | 9.512 | 10.629 | 11.617 | 12.538 | 13.404 | 14.218 |
| 4d |  |  | 15.958 | 13.072 | 11.238 | 11.392 | 12.882 | 12.813 | 13.442 | 13.618 | 14.763 | 15.877 | 16.942 | 17.970 | 18.974 | 19.960 | 20.934 | 21.893 |
| 5p |   |   |   |   |   |   |   |   |   |   |   |   | 8.470 | 9.102 | 9.995 | 10.809 | 11.612 | 12.425 |