1) potassium are soft silvery white metal with a Boling point of 63°C (145°F) and a boling point are 770°C (1,420°F)
2) It's density is 0.862 grams per cubic centimeter less than that of water (1.00 grams per cubic centimetrer that potassium metal float in water
1) vanadium is a silvery white, ductile, metallic looking solid. they capable of the being drawn into a thin wires
2) It melting point Is about 1,900°C (3,500°F) and its boiling point is about 3,000°C (5,400°F). the density is 6.11 grams per cubic centimeter