Radon (Rn) · 86 electrons · Noble gas
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6
Noble gas notation: [Xe] 4f14 5d10 6s2 6p6

Orbital diagram

Valence electrons
8
Unpaired electrons
0
Block
p-block
Magnetism (atom)
diamagnetic

Electrons per shell

Rn
K (n = 1)2
L (n = 2)8
M (n = 3)18
N (n = 4)32
O (n = 5)18
P (n = 6)8

How to write it

Place 86 electrons into subshells in the Aufbau order (1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p), filling s with 2, p with 6, d with 10 and f with 14. Radon sits in period 6, group 18, in the p-block, so its last electron enters a p subshell. Replacing the inner electrons with the previous noble gas gives the shorthand [Xe] 4f14 5d10 6s2 6p6.

Try radon and its ions in the calculator, or see the full radon data sheet.

Radon electron configuration FAQ

What is the electron configuration of radon?

1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² 6p⁶. Shorthand (noble gas) notation: [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶.

What is the noble gas configuration of radon?

[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶. The bracket stands for the Xe core electrons.

How many valence electrons does radon have?

8 (full outer shell).

How many unpaired electrons does radon have?

0 in the ground state, following Hund’s rule. With all electrons paired, the atom is diamagnetic.