Ts
Tennessine · element 117
Unknown, Probably Metalloid · Solid at room temperature
Tennessine 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.
Key facts
Atomic mass
294 u
how heavy one atom is
Phase (room temp.)
Solid
Density
7.17 g/cm³
how tightly packed it is
Melting point
723 K (450 °C)
when solid turns to liquid
Boiling point
883 K (610 °C)
when liquid turns to gas
Period
7
its row in the periodic table
Group
17
its column in the periodic table
Block
P-block
the neighbourhood it lives in
Electron configuration
*[Rn] 5f14 6d10 7s2 7p5
where its electrons live
Shells
2 · 8 · 18 · 32 · 32 · 18 · 7
electrons in each layer, inside to out
Discovered by
Joint Institute for Nuclear Research
who found it
Source: Wikipedia