Atomic Theory

7. This relationship between elements in compounds is always the same
8. The man who created the Gold Foil experiment and theorised that all of an atom's positive charge is concentrated in its nucleus
9. The positively charged particle in the nucleus
11. This shows the most likley locations for electrons in an atom
13. This man's experiments provided the first evidence that atoms are made of smaller particles

1. The most stable electron configuration
2. Name of the person who proposed that all elements are composed of atoms
3. The negatively charged particle in an atom
4. This exists because an atom can have different number of neutrons
5. This is the region of space around the nucleus where an electon is likley to be found
6. This man's experiments focussed on electrons and their positions
10. James Chadwick designed an experiment to show that these exist
11. Electrons change this level as they gain or lose energies
12. This number shows the number of electrons in an atom