Metal carbonate + acid -----> Metal salt + water + carbon dioxide

Metal + acid ----> metal salt + hydrogen

Metal oxide + acid ----> salt + water

Blue Litmus ----> Red

Red litmus ----> Blue

Alkali's have a pH greater than 7

Acids have a pH less than 7

The next capital letter shows that there is a new element

Smaller subscript numbers show how many of an element is in the chemical

pH stands for 'potenz hydrogen' i.e. the power of hydrogen

Calculating resistance = voltage divided by current in amps

Energy is measured in Ω

V= Voltage in Volts (V)

I= Current in Amps (A)

Energy is measured in Joules

Glucose + oxygen ----> carbon dioxide + water

Cells release energy through respiration