Choose incorrect option:-
1. Transition elements exhibit higher enthalpies of atomization.
2. Zinc is a transition element
3. Melting and boiling points increases steadily from Sc to Cu.
Choose incorrect option:-
1. Transition elements exhibit higher enthalpies of atomization.
2. Zinc is a transition element
3. Melting and boiling points increases steadily from Sc to Cu.
The correct option is B 2 & 3
Because of large number of unpaired electrons in the atoms of transition metals, they have stronger interatomic interaction and hence stronger bonding between atoms resulting in higher enthalpies of atomization.
Zinc is not regarded as a transition element because zinc atom has completely filled d orbitals (3d10) in its ground state as well as in its oxidized state.
The high melting & boiling points are attributed to the involvement of greater number of electrons from (n-1)d in addition to the ns electrons in the interatomic metallic bonding. From Sc to Cu, the melting points rise to a maximum at d5 (Cr) except for anomalous value of Mn and fall regularly as the atomic number increases due to decrease in no. of unpaired electrons.
2 & 3
Because of large number of unpaired electrons in the atoms of transition metals, they have stronger interatomic interaction and hence stronger bonding between atoms resulting in higher enthalpies of atomization.
Zinc is not regarded as a transition element because zinc atom has completely filled d orbitals (3d10) in its ground state as well as in its oxidized state.
The high melting & boiling points are attributed to the involvement of greater number of electrons from (n-1)d in addition to the ns electrons in the interatomic metallic bonding. From Sc to Cu, the melting points rise to a maximum at d5 (Cr) except for anomalous value of Mn and fall regularly as the atomic number increases due to decrease in no. of unpaired electrons.
