Across
- 3. A positively charged particle found in the center of an atom
- 7. A vertical column on the periodic table
- 9. A particle with neutral (no) charge found in the center of an atom
- 11. There are ___________ types of subatomic particles
- 12. When naming a compound, you replace the last few letters of the second element's name with ___________
- 13. An atom is to atoms as a ___________ is to compounds-the smallest amount of a compound that keeps that compound's properties
- 14. A particle with negative charge that orbits around the center of an atom
- 16. Elements to the right of the bolded line on the periodic table are ___________
- 19. Elements to the left of the bolded line on the periodic table are ___________
- 20. The first person to propose an atomic theory-his theory was generally rejected
- 21. An atom's charge is normally ___________
- 22. The periodic table is ordered by elements' atomic ___________, which also is equal to the number of protons/electrons in an atom of that element
Down
- 1. The smallest amount of any element that keeps that element's properties
- 2. Elements in the same group have similar ___________
- 4. A horizontal row on the periodic table
- 5. A chemical ___________ is made up of two or more atoms bonded together
- 6. The Atomic/Chemical ___________ of an element is used to represent it in chemical formulas and is a abbreviation of the elements name-the first letter is always capitalized, and the second letter never is
- 8. A model that organizes all the elements by number of protons that features repeating properties
- 10. Any substance that cannot be split up into two or more substances
- 15. The center of the atom is called the ___________, and is made up of protons and neutrons
- 17. An atom with a different number of protons than normal, and thus different mass, is called an ___________
- 18. Atom ___________ is measured in amu, and is equal to the number of protons + neutrons