Across
- 5. Positively charged particle within the nucleus
- 6. These gasses are in group 18 on the periodic table and have full electron shells
- 7. These metals lie in the center of the periodic table
- 9. Positively charged ions
- 13. What are subatomic particles composed of?
- 16. Who came up with the original atomic theory?
- 18. Isotope of ___-12 is used to define one amu
- 20. These metals lie in the first groups of the periodic table
- 22. ___ Atomic mass unit (u)
- 24. Atoms of the same element that differ in mass
- 25. Negatively charged particle orbiting the nucleus
- 27. ___ Number = # Of Protons + Nuetrons
Down
- 1. Law of multiple ___ when two elements react to form more than one compound, a fixed mass of one element will react with masses of the other elements in a ration of small-whole numbers
- 2. The other subatomic particle within the nucleus
- 3. Type of compound formed from two nonmetals
- 4. ___ formula with the simplest, whole number ratio of atoms
- 8. ___ Number = # Of Protons
- 10. Organization regulating the names of elements
- 11. Percent expressing the relative amount of an isotope found in nature
- 12. Scientist who discovered the fundamental charge
- 14. The smallest unit of an element that can participate in a chemical change
- 15. Law of ___ Proportions states that all samples of a pure compound contain the same elements in the same proportion by mass
- 17. Scientist who discovered the electron
- 19. Negatively charged ions
- 21. Compounds with the same chemical formula but different molecular structures
- 23. Type of compound formed from a cation and anion
- 26. Original atomic theory states that atoms are not destroyed or created, only rearranged