49 2 · 8 · 18 · 18 · 3

Indium, In, element 49

Post-transition metal· Period 5· Group 13· p-block

Configuration [Kr]4d105s25p1

Atomic weight
114.818Da
Phase
solid
Density
7.31g/cm³
Melting point
429.749K 156.6 °C
Boiling point
2,300.15K 2,027 °C
Electronegativity
1.78

Soft silvery element belonging to group 13 of the periodic table. The most common natural isotope is In-115, which has a half-life of 6*10^4 years. Five other radioisotopes exist. Discovered in 1863 by Reich and Richter. 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 indium

Atomic weight The standard atomic weight. For an element with no stable isotope, the mass of its longest-lived isotope.
114.818Da
Source: mendeleev
Electron configuration
[Kr]4d105s25p1
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.
1s22s22p63s23p63d104s24p64d105s25p1
Source: Worked outfrom electron configuration
Electrons in each shell Counted from the electron configuration, from the first shell outward.
2 · 8 · 18 · 18 · 3
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
1s0.990348.0097
2s12.876436.1236
2p4.10244.898
3s17.369231.6308
3p17.479331.5207
3d14.321834.6782
4s27.238821.7612
4p28.631220.3688
4d32.058416.9416
5s39.48859.5115
5p40.538.47