Question

explain the peculiar behaviour of beryllium?

Answer 1

Hi friend,



I have given you many properties as could as I can.

Peculiar properties of beryllium:-


(1) Be is the lightest alkaline earth metal.

(2) Be possesses higher melting point and boiling point than other group members.

(3) BeO is amphoteric in nature whereas oxides of other group members are strong base.

(4) It is not easily effected by dry air and does not decompose water at ordinary temperature.

(5) BeSO4 is soluble in water.

(6) Be and Mg carbonates are not precipitated by (NH4)2CO3 in presence of NH4Cl.

(7) Be and Mg salts do not impart colour to flame.

(8) Be does not form peroxide like other alkaline earth metals.

(9) It does not evolve hydrogen so readily from acids as other alkaline earth metals do so.

(10) It has strong tendency to form complex compounds.

(11) Be3N2 is volatile while the nitrides of other alkaline earth metals are non-volatile.

(12) It's salts can never have more than four molecules of water of crystallization as it has only four available orbitals in its valence shell.

(13) Berylium carbide reacts water to give methane whereas magnesium carbide and calcium carbide give propyne and acetylene respectively.

Be2C+4H2O → 2Be(OH)2 + CH4

Mg2C3 + 4H2O → 2Mg(OH)2 + C3H6

CaC2 + 2H2O → Ca(OH)2 + C2H4

Hope this helps you..

Answer 2

Beryllium is harder than other members of its group. 2) Beryllium has higher melting and boiling point than other members of its group. 3) Beryllium does not react with water even at high temperature while other metals do. 4) Beryllium forms covalent compounds whereas other members form ionic compounds.