Be
Beryllium · element 4
Alkaline Earth Metal · Solid at room temperature
Beryllium is a chemical element with symbol Be and atomic number 4. It is created through stellar nucleosynthesis and is a relatively rare element in the universe. It is a divalent element which occurs naturally only in combination with other elements in minerals.
Key facts
Atomic mass
9.01218315 u
how heavy one atom is
Phase (room temp.)
Solid
Density
1.85 g/cm³
how tightly packed it is
Melting point
1560 K (1287 °C)
when solid turns to liquid
Boiling point
2742 K (2469 °C)
when liquid turns to gas
Period
2
its row in the periodic table
Group
2
its column in the periodic table
Block
S-block
the neighbourhood it lives in
Electronegativity
1.57
how strongly it pulls electrons
Electron configuration
[He] 2s2
where its electrons live
Shells
2 · 2
electrons in each layer, inside to out
Discovered by
Louis Nicolas Vauquelin
who found it
Appearance
white-gray metallic
what it looks like
Source: Wikipedia