Xe
Xenon · element 54
Noble Gas · Gas at room temperature
Xenon is a chemical element with symbol Xe and atomic number 54. It is a colorless, dense, odorless noble gas, that occurs in the Earth's atmosphere in trace amounts. Although generally unreactive, xenon can undergo a few chemical reactions such as the formation of xenon hexafluoroplatinate, the first noble gas compound to be synthesized.
Key facts
Atomic mass
131.2936 u
how heavy one atom is
Phase (room temp.)
Gas
Density
5.894 g/L
how tightly packed it is
Melting point
161.4 K (-112 °C)
when solid turns to liquid
Boiling point
165.051 K (-108 °C)
when liquid turns to gas
Period
5
its row in the periodic table
Group
18
its column in the periodic table
Block
P-block
the neighbourhood it lives in
Electronegativity
2.6
how strongly it pulls electrons
Electron configuration
[Kr] 4d10 5s2 5p6
where its electrons live
Shells
2 · 8 · 18 · 18 · 8
electrons in each layer, inside to out
Discovered by
William Ramsay
who found it
Appearance
colorless gas, exhibiting a blue glow when placed in a high voltage electric field
what it looks like
Source: Wikipedia