Group 1 elements react with moist air. They are stored in oil to stop air and water vapour coming into contact with them. Moist air reacts with potassium to form potassium oxide. This creates a ...

They must be stored under oil to prevent them reacting with the air or water vapour. All Group 1 elements react with water to produce a metal hydroxide and hydrogen. This is the equation for the ...

If the elements you wish to select and group are located together, the easiest way to select them is by clicking and dragging your cursor over the area. Hovering over an element reveals a purple ...