IMPORTANT TRENDS OF
AlKALI METALS GROUP 1 CHEMISTRY
[1]■Atomic size of alkali metals:
Li < Na < K < Rb < Cs ( increases)
[2]■Melting point of Alkali metals :
Li > Na > K > Rb > Cs (decreases)
[3]■Density of Alkali metals:
☆Li < K < Na < Rb < Cs🌹《Exception》
[4]■Boiling point of alkali metals:
Li > Na > K > Rb > Cs (decreases)
[5]■Basic nature of alkali metal hydroxides:
LiOH < NaOH < KOH < RbOH < CsOH (increases)
[6]■ Solubility of alkali metal hydroxides:
LiOH < NaOH < KOH < RbOH < CsOH (increases)
[7]■Thermal stability of alkali metal hydroxides:
LiOH < NaOH < KOH < RbOH < CsOH (increases)
[8]■ Hydration energy of alkali metal ions : Li> Na > K> Rb > Cs (decreases)
[9]■ Ionisation Energy of alkali metals :
Li > Na > K > Rb > Cs(decreases)
[10]■ Stability of alkali metal hydrides :
LiH > NaH > KH > RbH> CsH(decreases)
[11]■Stability of alkali metal halides:
MF > MCl > MBr > MI (decreases)
[12]■Covalent character of alkali metal halides:
☆ LiI > LiBr > LiCl > LiF
LiCl > NaCl > KCl > RbCl > CsCl (decreases)
[13]■Melting point of alkali metal halides:
MF > MCl > MBr > MI (decreases)
[14]■Stability of alkali metal carbonates:
Li2CO3 < Na2CO3 < K2CO3 < Rb2CO3 < Cs2CO3 (Increases)
[15]■Ionic character of alkali metal carbonates:
Li2CO3 < Na2CO3 < K2CO3 < Rb2CO3 < Cs2CO3 (increases)
[16]■Reducing character in aqueous form:
Li > Cs > Rb > K > Na 《EXCEPTION 》
