50 2 · 8 · 18 · 18 · 4

Tin, Sn, element 50

Post-transition metal· Period 5· Group 14· p-block

Configuration [Kr]4d¹⁰5s²5p²

Atomic weight: 118.71Da
Phase: solid
Density: 7.287g/cm³
Melting point: 505.078K 231.93 °C
Boiling point: 2,859.15K 2,586 °C
Electronegativity: 1.96

Silvery malleable metallic element belonging to group 14 of the periodic table. Twenty-six isotopes are known, five of which are radioactive. Chemically reactive. Combines directly with chlorine and oxygen and displaces hydrogen from dilute acids. Description from mendeleev.

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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 tin

Atomic weight The standard atomic weight. For an element with no stable isotope, the mass of its longest-lived isotope.: 118.71Da; Source: mendeleev
Electron configuration: [Kr]4d¹⁰5s²5p²; Source: mendeleev
Uncertainty of the atomic weight: 0.007Da; Source: mendeleev
Electron configuration in full The electron configuration with the noble-gas core written out.: 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰5s²5p²; Source: Worked outfrom electron configuration
Electrons in each shell Counted from the electron configuration, from the first shell outward.: 2 · 8 · 18 · 18 · 4; 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.

Subshell	Screening σ	Effective charge Z − σ
1s	1.008	48.992
2s	13.1406	36.8594
2p	4.1146	45.8854
3s	17.5802	32.4198
3p	17.6468	32.3532
3d	14.2583	35.7417
4s	27.342	22.658
4p	28.7348	21.2652
4d	32.03	17.97
5s	39.3715	10.6285
5p	40.898	9.102