Atomic Theory

2. The most stable electron configuration
5. This man's experiments provided the first evidence that atoms are made of smaller particles
7. This man's experiments focussed on electrons and their positions
8. The negatively charged particle in an atom
9. This number shows the number of electrons in an atom
10. This exists because an atom can have different number of neutrons
13. James Chadwick designed an experiment to show that these exist
14. This relationship between elements in compounds is always the same

1. Name of the person who proposed that all elements are composed of atoms
3. The man who created the Gold Foil experiment and theorised that all of an atom's positive charge is concentrated in its nucleus
4. This shows the most likley locations for electrons in an atom
6. The positively charged particle in the nucleus
11. This is the region of space around the nucleus where an electon is likley to be found
12. Electrons change this level as they gain or lose energies