Group 1

Question 1

What are the properties of group 1?

Answer 1

They are all soft metals
They have relativley low densities and melting points
They are very reactive

Question 2

What is the general equation for group 1 metals when they react with water?

Answer 2

Group 1 metal + Water —–> Metal Hydroxide + Hydrogen

Question 3

What are the oberservations of group 1 metals when they react with water? and what are the trends?

Answer 3

Lithium: Relatively slow, fizzing, moves on the surface of the water
Sodium: More vigorous fizzing, moves rapidly on the surface of water, dissolves quickly
Potassium: More vigorous than sodium. burns in a lilac flame, moves very rapidly on the surface, dissolves very quickly

Question 4

How would you predict the physical properties of rubidium?

Answer 4

A soft grey solid
Shiny when freshly cut
More dense than potassium
Lower melting point than potassium