Aston's quartz microbalance, c 1919.

Aston's quartz microbalance, c 1919.
2 8 c m
40cm
actual image size: 32cm x 20cm

Description

F W Aston (1877-1945) was an English chemical physicist who devised a way to separate atoms of similar mas and measure these mases accurately. He showed clearly that over fifty elements consisted of atoms of similar but different atomic mas, but the same atomic number. These are known as isotopes.

Image Details

Image Ref.
 
10306996

© Science Museum / Science & Society Picture Library

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