1. Education

Your suggestion is on its way!

An email with a link to:


was emailed to:

Thanks for sharing About.com with others!

Effective Nuclear Charge Definition


Effective nuclear charge is the net charge an electron sees.

Effective nuclear charge is the net charge an electron sees.

Science Photo Library - MEHAU KULYK, Getty Images

Effective Nuclear Charge Definition: The effective nuclear charge is the net charge an electron experiences in an atom with multiple electrons.

Higher energy electrons can have other lower energy electrons between the electron and the nucleus, effectively lowering the positive charge experienced by the high energy electron.

Examples: A 2s lithium electron can have 2 1s electrons between itself and the lithium nucleus. Measurements indicate the effective nuclear charge experienced by a 2s lithium electron is 0.43 times the charge of the lithium nucleus.

Explore Chemistry
By Category
    chemistryChemistryeducationEducationb1502264c800010e8a82acfc31538f2e0d00093df9134410http://chemistry.about.comod526F6F747815liveAnne Marie Helmenstine, Ph.D.chemistryguide2z80008fzNIP11970-01-0110/od/index.htm0526F6F741approved/od
  1. About.com
  2. Education
  3. Chemistry
  4. Chemistry Disciplines - Branches of Chemistry
  5. Chemical Engineering
  6. Engineering Glossary
  7. Effective Nuclear Charge Definition

©2015 About.com. All rights reserved.