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The subjunctive is a mood which expresses actions or ideas which have an element of doubt or subjectivity about them. Examples include emotions, will/wanting, possibility, necessity and opinions/judgem...

Cadences are often described as musical punctuation. They come at the ends of musical phrases and passages. There is a perfect cadence, which sounds final, like a full stop; there is an imperfect caden...

Metals have delocalised electrons which are free to move and carry charge throughout the sea of cations.

A depression is a weather system of low pressure which moves across the British Isles from west to east. It involves two air masses which meet at a front. The air masses are tropical maritime which bri...

Ionic bonds are electrostatic forces of attraction between oppositely charged ions.