Group 1 metals react vigorously with water produces alkali and hydrogen gas
Observation
Lithium metal moves slowly on the surface of the water with ‘fizzing’ sound.
Observation
The lump of sodium moves swiftly on the surface of the water with ‘fizzing’ sound
Observation
Potassium reacts violently with water, move very fast on the surface of the water and burn with a lilac flame.