Atomic Theory

5. He confirmed the existence of a neutral subatomic particle with a similar mass to a proton.
7. the opposite of a synthetic reaction.
11. He concluded that electrons are a part of atoms.
15. Electrons, neutrons and protons are all...
16. path of electrons around the nucleus.
17. Rutherford's gold foil experiment provided evidence for the existence of the ____.
21. The first group on the periodic table.
23. A chemical reaction that often creates fire.
24. What is the maximum number of electrons that can occupy an orbital?
25. This Greek philosopher believed all matter to be comprised of four basic elements; earth, air, fire and water.

1. which subatomic particle has a negative charge?
2. He first proposed that everything is made of tiny particles.
3. the Greek Philosopher Democritus coined what word for a tiny piece of matter that cannot be divided?
4. His model placed the electrons in orbits with specific amounts of energy around the nucleus.
6. Atoms of the same element with different neutrons.
8. When electrons flow from atom to atom.
9. The strongest form of radioactivity.
10. the number of protons in one atom of an element is that element's...
12. the nuclei of isotopes of the same atom contain different numbers of...
13. Ernest Rutherford conducted the ___ foil experiment.
14. Outer electrons are called ____ electrons.
18. Protons and neutrons each contain three of these fundamental constituents of matter.
19. developed the first modern atomic theory.
20. What do scientists use to predict locations of electrons in atoms?
22. A nucleus in an atom contains neutrons and...