In the nineteenth century the more grandiose word inspiration began to replace the word idea in the arts.

Alkali metals such as sodium, potassium, rubidium, caesium and francium are extremely reactive elements, just putting them in water can result in an explosion! They are carefully stored in oil to prevent this happening.

While aluminum is the most common metal found in the Earth's crust, the most common metal found on Earth is iron, mostly because it makes up such a large part of the Earth's core.

The chemical symbol used for silver is Ag, this comes from the Latin word for silver, argentum.