Berylium is exception . Why ?
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Please find the solution to the asked query:
Beryllium has atomic number of 4 and is smallest element of alkaline earth metal series. Due to its small size and high electronegativity, It has 4 electrons overall and thus it has maximum valency of 4. Thus it can form 4 bonds and has coordination number of 4. However, other elements of the same series, have more valence electrons and thus form more bonds. Thus, beryllium shows anomalous behaviour. The other members of the same group has coordination number of 6.
Be has smaller size, high effective nuclear charge, absence of d-orbital. These facts make it different from other members of alkaline earth metals.
Be is very different than the other members Mg, Ca, Sr, and Ba in that it forms covalent bonds. This is evident from the
much lower boiling and melting point of its salts compared to the other group 2 elements.
In addition, beryllium hydroxide is amphoteric; that is, beryllium can interact to form a positive ion, or it can become part of a negative ion.
Hope this information will clear your doubts regarding the topic. If you have any other doubts please ask here on the forum and our experts will try to solve them as soon as possible.
Regards
Please find the solution to the asked query:
Beryllium has atomic number of 4 and is smallest element of alkaline earth metal series. Due to its small size and high electronegativity, It has 4 electrons overall and thus it has maximum valency of 4. Thus it can form 4 bonds and has coordination number of 4. However, other elements of the same series, have more valence electrons and thus form more bonds. Thus, beryllium shows anomalous behaviour. The other members of the same group has coordination number of 6.
Be has smaller size, high effective nuclear charge, absence of d-orbital. These facts make it different from other members of alkaline earth metals.
Be is very different than the other members Mg, Ca, Sr, and Ba in that it forms covalent bonds. This is evident from the
much lower boiling and melting point of its salts compared to the other group 2 elements.
In addition, beryllium hydroxide is amphoteric; that is, beryllium can interact to form a positive ion, or it can become part of a negative ion.
Hope this information will clear your doubts regarding the topic. If you have any other doubts please ask here on the forum and our experts will try to solve them as soon as possible.
Regards
