The first member of each group of representative elements (i.e., s and p - block elements) shows anomalous behaviour. Illustrate with two examples.
The first member of each group of representative elements (i.e., s and p - block elements) shows anomalous behaviour. Illustrate with two examples.
First member of each group of representative elements (i.e., s-and p- block elements) shows anomalous behaviour due to (i) small size (ii) Higher ionisation enthalpy (iii) higher electronegativity and (iv) absence of d- orbitals e.g., in s - block elements, lithium shows anomalous behaviour from the rest of the alkali metals.
(a) Compounds of lithium have significant covalent character. While compounds alkali metals are predominantly ionic.
(b) Lithium reacts with nitrogen to form lithium nitride while other alkali metals do not form nitrides.
In p- block elements, first member of each group has four orbitals, one 2s orbital and three 2 p orbitals in their valence shell. So, these elements show a maximum covalency of four while other members of the same group or different group show a maximum covalency beyond four due to the availability of vacant d - orbitals.
First member of each group of representative elements (i.e., s-and p- block elements) shows anomalous behaviour due to (i) small size (ii) Higher ionisation enthalpy (iii) higher electronegativity and (iv) absence of d- orbitals e.g., in s - block elements, lithium shows anomalous behaviour from the rest of the alkali metals.
(a) Compounds of lithium have significant covalent character. While compounds alkali metals are predominantly ionic.
(b) Lithium reacts with nitrogen to form lithium nitride while other alkali metals do not form nitrides.
In p- block elements, first member of each group has four orbitals, one 2s orbital and three 2 p orbitals in their valence shell. So, these elements show a maximum covalency of four while other members of the same group or different group show a maximum covalency beyond four due to the availability of vacant d - orbitals.
