54 2 · 8 · 18 · 18 · 8

Xenon, Xe, element 54

Noble gas· Period 5· Group 18· p-block

Configuration [Kr]4d105s25p6

Atomic weight
131.293Da
Phase
gas
Density
0.005366g/cm³
Melting point
161.4K -111.7 °C
Boiling point
165.051K -108.1 °C
Electronegativity
2.6

Colourless, odourless gas belonging to group 18 on the periodic table (the noble gases.) Nine natural isotopes and seven radioactive isotopes are known. Xenon was part of the first noble-gas compound synthesized. Several others involving Xenon have been found since then. Xenon was discovered by Ramsey and Travers in 1898. Description from mendeleev.

Back to the table
The outermost shell: the valence electronsThe inner shellsThe nucleus One bead for each electron, on the ring of its shell, counted from the nucleus out. The rings turn at their own pace; the model is Bohr's picture of the atom, which places electrons in shells but not on true orbits.

Atomic properties

5 of 5 fields have a value for xenon

Atomic weight The standard atomic weight. For an element with no stable isotope, the mass of its longest-lived isotope.
131.293Da
Source: mendeleev
Electron configuration
[Kr]4d105s25p6
Source: mendeleev
Uncertainty of the atomic weight
0.006Da
Source: mendeleev
Electron configuration in full The electron configuration with the noble-gas core written out.
1s22s22p63s23p63d104s24p64d105s25p6
Source: Worked outfrom electron configuration
Electrons in each shell Counted from the electron configuration, from the first shell outward.
2 · 8 · 18 · 18 · 8
Source: Worked outfrom electron configuration

Screening of each subshell

Clementi's screening constants: how much of the nucleus's charge the other electrons hide from an electron in each subshell. What is left is the effective nuclear charge it feels.

SubshellScreening σEffective charge Z − σ
1s1.078552.9215
2s14.19739.803
2p4.165449.8346
3s18.423635.5764
3p18.332435.6676
3d14.053239.9468
4s27.827226.1728
4p29.042824.9572
4d32.106821.8932
5s39.78214.218
5p41.575512.4245