Nuclear attraction

Nuclear attraction is the electrostatic attraction between a positively charged nucleus and negatively charged electrons. Its effective influence on an electron depends on distance, shielding by other electrons, and the atom’s structure.

Meaning and context

Effective nuclear charge is a model describing the net positive attraction experienced by an electron after accounting for shielding. It is not simply the full proton count acting without interference from the rest of the atom.

Examples and usage

Across many main-group periods, increasing nuclear charge helps draw outer electrons more strongly even as additional electrons are added. Down a group, additional shells and shielding change the comparison. These competing effects help explain periodic trends.

What to check

Do not confuse nuclear attraction in this atomic-structure discussion with the forces binding protons and neutrons inside the nucleus. The terminology refers to different physical interactions. A trend explanation is a model, not a numerical calculation of every electron’s exact experience.

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