Li
Lithium · element 3
Alkali Metal · Solid at room temperature
Lithium (from Greek:λίθος lithos, "stone") is a chemical element with the symbol Li and atomic number 3. It is a soft, silver-white metal belonging to the alkali metal group of chemical elements. Under standard conditions it is the lightest metal and the least dense solid element.
Key facts
Atomic mass
6.94 u
how heavy one atom is
Phase (room temp.)
Solid
Density
0.534 g/cm³
how tightly packed it is
Melting point
453.65 K (180 °C)
when solid turns to liquid
Boiling point
1603 K (1330 °C)
when liquid turns to gas
Period
2
its row in the periodic table
Group
1
its column in the periodic table
Block
S-block
the neighbourhood it lives in
Electronegativity
0.98
how strongly it pulls electrons
Electron configuration
[He] 2s1
where its electrons live
Shells
2 · 1
electrons in each layer, inside to out
Discovered by
Johan August Arfwedson
who found it
Appearance
silvery-white
what it looks like
Source: Wikipedia