Atomic Theory

4. This man's experiments focussed on electrons and their positions
5. This number shows the number of electrons in an atom
8. This relationship between elements in compounds is always the same
9. James Chadwick designed an experiment to show that these exist
11. This man's experiments provided the first evidence that atoms are made of smaller particles
13. This shows the most likley locations for electrons in an atom
14. The positively charged particle in the nucleus

1. The most stable electron configuration
2. The man who created the Gold Foil experiment and theorised that all of an atom's positive charge is concentrated in its nucleus
3. Name of the person who proposed that all elements are composed of atoms
6. The negatively charged particle in an atom
7. This exists because an atom can have different number of neutrons
10. Electrons change this level as they gain or lose energies
12. This is the region of space around the nucleus where an electon is likley to be found