48 2 · 8 · 18 · 18 · 2

Cadmium, Cd, element 48

Transition metal· Period 5· Group 12· d-block

Configuration [Kr]4d105s2

Atomic weight
112.414Da
Phase
solid
Density
8.69g/cm³
Melting point
594.219K 321.07 °C
Boiling point
1,040.15K 767 °C
Electronegativity
1.69

Soft bluish metal belonging to group 12 of the periodic table. Extremely toxic even in low concentrations. Chemically similar to zinc, but lends itself to more complex compounds. Discovered in 1817 by F. Stromeyer. 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 cadmium

Atomic weight The standard atomic weight. For an element with no stable isotope, the mass of its longest-lived isotope.
112.414Da
Source: mendeleev
Electron configuration
[Kr]4d105s2
Source: mendeleev
Uncertainty of the atomic weight
0.004Da
Source: mendeleev
Electron configuration in full The electron configuration with the noble-gas core written out.
1s22s22p63s23p63d104s24p64d105s2
Source: Worked outfrom electron configuration
Electrons in each shell Counted from the electron configuration, from the first shell outward.
2 · 8 · 18 · 18 · 2
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
1s0.974447.0256
2s12.614235.3858
2p4.09143.909
3s17.158830.8412
3p17.308530.6915
3d14.393133.6069
4s27.130820.8692
4p28.588819.4112
4d32.123215.8768
5s39.8088.192