Question

Discuss beryllium as it differ from other members of the group

Answer 1

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1) Beryllium is harder than other members of its group...

2) Beryllium has higher melting and boiling point than other members of its group...

4) Beryllium forms covalent compounds whereas other members form ionic compounds. Because of covalent character , salts of beryllium are easily hydrolysed...

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Answer 2

Explanation:

• Beryllium is a hard metal while other alkaline earth metals are soft.

• Beryllium is the least metallic element as compared to other alkaline earth metals.

• As beryllium has high ionization enthalpy and small size, it forms compounds which are largely covalent and it also gets hydrolysed easily.

• Beryllium has the highest melting point, boiling point and ionization enthalpy compared to all other alkaline earth metals.

• BeO and Be(OH)2 are amphoteric in nature while oxides and hydroxides of other alkaline earth metals are basic in nature.

• Beryllium does not liberate H2, from acids (HCI, H2SO4), while other metals do.

• Beryllium does not show coordination number more than four, as in its valence shell there are only four orbitals (2s and 2p). The remaining members of the group can have a coordination number of six by making use of d-orbitals.