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| abstraction > mathematical concept > number > constant > fundamental physical constant > particle constant > particle mass > electron mass | 
| electron 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 | ||||
| electron mass | 0.00000072 × 10-31 kg | 9.10938188 × 10-31 kg | me | electron | particle mass | 
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