Chemistry SG

3. the amount of evidence released when atoms split.
4. the elements forming more than one compound have ratios by mass in small whole numbers.
5. number of protons in the nucleus of the atom
7. identifies the total number of protons and neutrons in the nucleus of an atom.
12. discovery of protons
13. (350 Bc) Greek Philosopher.
15. electrons must be present in all types of…
18. Average Atomic mass: the weighted average mass of the atoms in naturally occurring sample of that element.
19. (1808) developed the Atomic Theory.
20. used logic and reasoning and not scientific methodology (it didn’t exist yet)
22. regardless of the size of the sample,the elements w/in the compound always have the same proportion by mass.
23. regardless of the gas contained in the tube or the metal used for the electrodes the results were…
24. 2. Nuclei of atoms can be split ( atomic bomb)

1. elementary particles that combine to form other subatomic particles, such as protons and neutrons( generally six different type)
2. discovery of the Electrons using the cathode ray.
6. (Atoms are not…) 1. Atoms composed of subatomic particles
8. smallest particle of an element (unable to be cut)
9. the reason why Atoms of the same element may be different.. and # of neutrons.
10. C. Discovery of Neutrons (1932) developed nuclear weapons
11. determined the charge and mass of an electron.
14. discovery of the nucleus
16. Explains the what happens as a pattern while scientific theories: attempt to explain how or why the events occur.
17. neutral: atoms
21. Hyphen notation ex: Hydrogen-1,Carbon-12( mass #)
22. matter is neither created nor destroyed.