shielding

…is referred to as the shielding of the nuclear charge. Next, it is necessary to note that a 2s electron can penetrate through the core (that is, have nonzero probability of being found closer to the nucleus than the bulk of the core electron density). If penetration occurs, the electron…

…tetramethylsilane, are said to be shielded from the applied field of the instrument’s magnet. The electronegative bromine atom in bromoethane pulls electrons away from the carbon and hydrogen atoms. The CH₂ hydrogens are more strongly affected than the CH₃ hydrogens and thus have a greater chemical shift, because they are…

…interactions (sometimes referred to as shielding) is that the relative order of the various atomic orbitals is different in many-electron atoms from that in the hydrogen atom; in fact, it changes continuously as the number of electrons increases.