## What is the EAN rule in chemistry?

## What does EAN stand for?

- Effective atomic number. Written By: Effective atomic number (
**EAN**), number that represents the total number of electrons surrounding the nucleus of a metal atom in a metal complex.

## What is effective atomic number (EAN)?

- The sum of the electrons on the metal plus the electrons donated from the ligands was called the effective atomic number (
**EAN**), and when it was equal to 36 (Kr), 54 (Xe) and 86 (Rn), the**EAN rule**is said to be obeyed.

## How do you calculate the eneean rule?

**EAN rule**is often referred to as the “18-electron rule”. It can be calculated using the formula as the sum of electrons on the metal ion and the number of electrons denoted by ligands. Was this answer helpful?

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