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117Ts294.000
Tennessine
unknown, probably metalloidTennessine is a superheavy artificial chemical element with an atomic number of 117 and a symbol of Ts. Also known as eka-astatine or element 117, it is the second-heaviest known element and penultimate element of the 7th period of the periodic table. As of 2016, fifteen tennessine atoms have been observed:six when it was first synthesized in 2010, seven in 2012, and two in 2014.
Phase: Solid
2, 8, 18, 32, 32, 18, 7
Physical Properties
Atomic Mass294 u
Density7.17 g/cm³
Melting Point723 K
Boiling Point883 K
Period7
PhaseSolid
Chemical Properties
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p5
Semantic Config*[Rn] 5f14 6d10 7s2 7p5
Shells2, 8, 18, 32, 32, 18, 7
Electron Affinity165.9 kJ/mol
Discovery
Discovered byJoint Institute for Nuclear Research