103 predicted 2 · 8 · 18 · 32 · 32 · 8 · 3

Lawrencium, Lr, element 103

Actinide· Period 7· Group 3· d-block

Configuration [Rn]5f147s27p1

Atomic weight
262Da
Phase
solid, predicted
Density
14.4g/cm³, predicted
Melting point
1,900.15K, predicted 1,627 °C
Boiling point
No data
Electronegativity
1.3, predicted

Appearance unknown, however it is most likely silvery-white or grey and metallic. Lawrencium is a synthetic rare-earth metal. There are eight known radioisotopes, the most stable being Lr-262 with a half-life of 3.6 hours. Due to the short half-life of lawrencium, and its radioactivity, there are no known uses for it. Identified by Albert Ghiorso in 1961 at Berkeley. It was produced by bombarding californium with boron ions. The name is temporary IUPAC nomenclature, the origin of the name comes from Ernest O. Lawrence, the inventor of the cyclotron. If sufficient amounts of lawrencium were produced, it would pose a radiation hazard. 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

4 of 5 fields have a value for lawrencium

Atomic weight The standard atomic weight. For an element with no stable isotope, the mass of its longest-lived isotope.
262Da
Source: mendeleev
Electron configuration
[Rn]5f147s27p1
Source: mendeleev
Electron configuration in full The electron configuration with the noble-gas core written out.
1s22s22p63s23p63d104s24p64d104f145s25p65d105f146s26p67s27p1
Source: Worked outfrom electron configuration
Electrons in each shell Counted from the electron configuration, from the first shell outward.
2 · 8 · 18 · 32 · 32 · 8 · 3
Source: Worked outfrom electron configuration

No data uncertainty of the atomic weight.