The nuclear atom

IB Chemistry: The nuclear atom

Atomic theory is just that - a theory - but it is a very good one! Humans will never be able to see atoms as an atom is smaller than the wavelength of visible light. However scanning tunnelling microscopy does provide direct evidence to support the existence of atoms. This uses a very fine probe with a tungsten tip to scan a solid surface. It records the minute changes in current due to uneven surfaces when a potential...

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