Across
- 3. what type of diagram/ model shows the number and location of atoms in an element
- 5. what element has to atomic number 55
- 7. discovered by Chadwick
- 8. what element did Chadwick use in his discovery
- 10. what is a different atom of an element
Down
- 1. what type of scientist was Chadwick
- 2. who discovered the neutron
- 4. where are neutrons and protons located
- 6. what is a neutron
- 7. what type of charge does a neutron have
- 9. which theory did Chadwick help develop