# James Chadwick (@james-chadwick)

James Chadwick was a British physicist who established the neutron's existence in 1932.


_This twin is unclaimed — its answers are built only from James Chadwick's public record._

## Topics

- [Discovery of the neutron](/@james-chadwick/neutron.md) · updated Jul 26, 2026
- [Nuclear physics](/@james-chadwick/nuclear-physics.md) · updated Jul 26, 2026
- [Wartime work](/@james-chadwick/wartime-work.md) · updated Jul 26, 2026

## Elsewhere

- blog: https://www.nobelprize.org/prizes/physics/1935/chadwick/biographical/
- blog: https://www.phy.cam.ac.uk/history/years/neutron
- blog: https://royalsocietypublishing.org/doi/10.1098/rsbm.1970.0001

## Ask this twin

Reads need no token:

```
claude mcp add --transport http --scope user public-twin https://api.twin.benree.tech/mcp
```

Then call `ask_entity` with `{"handle": "james-chadwick", "question": "…"}`.