Alkali metals
Syllabus
✓ Periodic discussion and General Characteristics of alkali metal
✓ Sodium: Occurrence, extraction from Down’s process, properties
and uses
✓ Sodium Hydroxide: Manufacture by diaphragm cell, properties
and uses.
✓ Sodium Carbonate: Manufacture by Solvay Process, properties
and uses.
, Periodic variation of atomic properties of alkali
Atomic Radius (atomic size) and Ionic Radius : Atomic radius increases wi
increase in atomic number. Increase in atomic number (i.e. nuclear charge) is masked by incre
the value of “n” and decreases the value of effective nuclear charge & size increases in IA
group.
Li Na K Rb Cs
1.23 Å 1.54 Å 2.03 Å 2.16 Å 2.35 Å
Ionization Energy (IE) : Decreases with the gradual increase in atomic size
Li Na K Rb Cs
502.2 KJ/mol 495.8KJ/mol 418.8 KJ/mol 403 KJ/mol 375.7 KJ/mol
Syllabus
✓ Periodic discussion and General Characteristics of alkali metal
✓ Sodium: Occurrence, extraction from Down’s process, properties
and uses
✓ Sodium Hydroxide: Manufacture by diaphragm cell, properties
and uses.
✓ Sodium Carbonate: Manufacture by Solvay Process, properties
and uses.
, Periodic variation of atomic properties of alkali
Atomic Radius (atomic size) and Ionic Radius : Atomic radius increases wi
increase in atomic number. Increase in atomic number (i.e. nuclear charge) is masked by incre
the value of “n” and decreases the value of effective nuclear charge & size increases in IA
group.
Li Na K Rb Cs
1.23 Å 1.54 Å 2.03 Å 2.16 Å 2.35 Å
Ionization Energy (IE) : Decreases with the gradual increase in atomic size
Li Na K Rb Cs
502.2 KJ/mol 495.8KJ/mol 418.8 KJ/mol 403 KJ/mol 375.7 KJ/mol
