How To Calculate Ionisation Energy Of Hydrogen Atom

How to Calculate Ionisation Energy of Hydrogen Atom

Introduction & Importance

Ionisation energy is a crucial concept in chemistry, measuring the energy required to remove an electron from an atom. For hydrogen, it’s particularly significant as it’s the simplest atom…

How to Use This Calculator

1. Select the principal quantum number (n).
2. Enter the atomic number (Z).
3. Click ‘Calculate’.

Formula & Methodology

The ionisation energy (IE) of hydrogen can be calculated using the formula:

IE = -13.6 * (Z^2 / n^2)

Real-World Examples

n	Z	IE (eV)
1	1	13.6
2	1	3.4

Data & Statistics

n	IE (eV)
1	13.6
2	3.4
3	1.5

Expert Tips

• Ionisation energy increases with increasing principal quantum number (n).
• It decreases with increasing atomic number (Z).

Interactive FAQ

What is the ionisation energy of hydrogen (n=1)?

The ionisation energy of hydrogen with n=1 is 13.6 eV.

For more information, see NIST’s Atomic Weights and Ionic Charges and OpenStax’s Ionization Energy.