Alkali Metals - created from Mind Map

Page 1

Atomic Size

Ionization Energy

Electronegativity

Metallic Nature

Melting and Boiling Points

Reaction with air or Oxygen

Reaction with Water: They react with water and form Alkali (base) and releases Hydrogen gas. 2Na+2H2O --> 2NaOH + H2

Increase down the group: Reasons: Number of shells increased down the group, less nuclear attraction, more e-e repulsion (more shielding)

Decrease down the group: Number of shells increased down the group(size increased), less nuclear attraction, more e-e repulsion (more shielding), e- are easy to removed down to the group

Decrease down the group: More no of shells, less nuclear attraction, more e-e repulsion, not easy to attract the electrons

Metallic Character increased: less IE down the group hence more metal

Decrease down the group. Size increased, less nuclear attraction, more e-e repulsion. metallic bond is less strong, easy to break.

Nature of Oxides: Burn in air or oxygen. M2O 4Na + O2 --> 2Na2O Their Oxides are basic in nature as they form base when dissolve in water Na2O + H2O -> 2NaOH