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| abstraction > mathematical concept > number > constant > fundamental physical constant > particle constant > particle mass > neutron mass | 
| neutron mass comparison table | ||||||
| Subject | has uncertainty | has value | has symbol | applies to particle | is a kind of | is an instance of | 
|---|---|---|---|---|---|---|
| particle mass | changes in value are due solely to an increase in measurement accuracy or convention | mass | ||||
| neutron mass | 0.00000013 × 10-27 kg | 1.67492716 × 10-27 kg | mn | neutron | particle mass | 
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