Beryllium (Be)
Beryllium is the chemical element with the symbol Be. In the periodic table, it is
Group II element. Group II elements are found o Earth and react with water to
form alkalis so they are called alkaline metals.
The similarities of Beryllium:
atomic number
4
relative atomic mass
9.0122
2
2
electron configuration 1s 2s
ionization energy
first: 899 kJ/mol
second: 1,757 kJ/mol
atomic radius
111 pm
ionic radius
35 pm
melting point
1,287°C (2,349°F)
boiling point
2,500°C (4,532°F)
relative density
1.848
From the above form, we can see that Beryllium is relatively unreactive. It
forms divalent, tetra coordinate compounds which are very poisonous. Also,
Beryllium has relatively low melting and boiling points and has low densities.
Beside this, Beryllium is reactive metals that react readily with dilute
hydrochloric acid to give hydrogen gas and reacts with non-metals to form
compounds called salts.
The picture of Beryllium: