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Research Elements

Radon

Rn · atomic number 86

Noble gas · period 6, group 18

Electrons

Rn

[Xe] 4f14 5d10 6s2 6p6

Shells: 2, 8, 18, 32, 18, 8

Valence electrons: 8 in the outer shell (6s2 6p6)

  • Outer s and p
  • Core

Green dots are the outer shell's s and p electrons. Softer green dots are the d electrons of transition metals, and the d and f electrons of lanthanides and actinides: they often take part in bonding, but not always. Grey dots are the core. Ground-state configuration from the NIST Atomic Spectra Database (A. Kramida, Yu. Ralchenko, J. Reader and the NIST ASD Team).

Natural isotopes

No natural isotope with a defined abundance in NIST's Atomic Weights and Isotopic Compositions.