Thallium

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Thallium
Tl
In situ availability:
Necessity:
Atomic number: 81
Atomic mass: 204.3833
group: 13
period: 6
normal phase: Solid
series: Poor Metals
density: 11.85 g/cm3
melting point: 577K,
304°C,
579°F
boiling point: 1746K,
1473°C,
2683°F
Cd ← In → Sn
Hg ← Tl → Pb
Uub ← Uut → Uuq
Atomic radius (pm): 190
Bohr radius (pm): 156
Covalent radius (pm): 148
Van der Waals radius (pm): 196
ionic radius (pm): (+1) 159
1st ion potential (eV): 6.11
Electron Configuration
1s2
2s2 2p6
3s2 3p6 3d10
4s2 4p6 4d10 4f14
5s2 5p6 5d10
6s2 6p1
Electrons Per Shell
2, 8, 18, 32, 18, 3
Electronegativity: 1.8
Electron Affinity: 0.2
Oxidation states: 3, 1
Magnetism: ?
Crystal structure: Hexagonal

Thallium is a Poor Metal in group 13. It has a Hexagonal crystalline structure. This element has two stable isotopes: 203 and 205.




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