51 2 · 8 · 18 · 18 · 5

Antimony, Sb, element 51

Metalloid· Period 5· Group 15· p-block

Configuration [Kr]4d105s25p3

Atomic weight
121.76Da
Phase
solid
Density
6.68g/cm³
Melting point
903.778K 630.63 °C
Boiling point
1,860.15K 1,587 °C
Electronegativity
2.05

Element of group 15. Multiple allotropic forms. The stable form of antimony is a blue-white metal. Yellow and black antimony are unstable non-metals. Used in flame-proofing, paints, ceramics, enamels, and rubber. Attacked by oxidizing acids and halogens. First reported by Tholden in 1450. 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 antimony

Atomic weight The standard atomic weight. For an element with no stable isotope, the mass of its longest-lived isotope.
121.76Da
Source: mendeleev
Electron configuration
[Kr]4d105s25p3
Source: mendeleev
Uncertainty of the atomic weight
0.001Da
Source: mendeleev
Electron configuration in full The electron configuration with the noble-gas core written out.
1s22s22p63s23p63d104s24p64d105s25p3
Source: Worked outfrom electron configuration
Electrons in each shell Counted from the electron configuration, from the first shell outward.
2 · 8 · 18 · 18 · 5
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
1s1.025649.9744
2s13.404637.5954
2p4.127446.8726
3s17.790933.2091
3p17.816133.1839
3d14.200236.7998
4s27.456423.5436
4p28.818822.1812
4d32.025618.9744
5s39.38911.611
5p41.00559.9945