# Remembering the formula for slag

Slag is CaSiO_{3}_{.}

_{}

This may look like a slag heap but when you look at it closely, you can see it is made up of Casio calculators! **Casio** (CaSiO) calculators with a **tree** = CaSiO_{3}

From the formula, you should be able to work out that slag contains:

Calcium (Ca)(Calcium)

Silicon (Si)(Silic)

Oxygen (O)(ate) Definition of ate

Therefore, the compound is actually calcium silicate.