Across
- 4. Two of this + 1 oxygen makes water
- 5. The degree of compactness of a sustance
- 6. Not really Pb, but its in your pencils
- 8. Highly compressed carbon
- 11. A Hollywood theater, atomic number 46
- 14. Any of two or more forms of an element, having the same number of protons in the nucleus, with a different number of neutrons in the nucleus.
- 15. This force resists motion, resulting in heat
- 17. Force that attracts a body to another body with mass
- 20. A 4th state of matter not solid, liquid or gas, present in stars and fusion reactors
Down
- 1. A process in which the nuclei of atoms are joined
- 2. energy in motion
- 3. sugar, gasoline, methane
- 7. A particle of matter with the same mass as an electron but an opposite charge
- 9. Closest planet to the Sun, element symbol Hg
- 10. My atoimic number is 13
- 12. The medieval forerunner of chemistry, based on the supposed transformation of matter.
- 13. The spliting of an atom
- 16. A system of millions or billions of stars, the Milky Way
- 18. The world's first polymath, first multi-genius
- 19. A non-crytalline amorphous solid