The element with the chemical symbol Pb

Molluscs with three hearts, nine brains and blue blood

Japanese word for the day after tomorrow

Reaction used to break an ester down into a carboxylic acid and alcohol

Known as the smallest country in the world

A series of campaigns waged by William the Conqueror in 1069

Chemical change that occurs at the anode

Name given to a group of owls

Known in Chinese mythology as the Mother goddess, creating humanity and repairing the pillar of heaven

An elements ability to exist in 2 or more different physical forms

A very thin filament of a hard to melt metal, such as tungsten, encased in glass filled with inert gases to prevent the filament from oxidising or disintegrating

The constant that is constant in space but not constant in time

The spontaneous emission of a positively charged particle equivalent to helium

The first battle won by the Americans during the American revolution

The number of ways you can make change for ten U.S dollars to the nearest million