Across
- 2. A horizontal row in the periodic table
- 4. Electron _____, the area around the nucleus of an atom where electrons are most likely found
- 5. Tiny atomic particle that has mass and a positive electric charge
- 9. The smallest particle of an element that still retains the properties of the element
- 10. An atom of an element with a different mass, but the same chemical properties
- 11. The discrete amount of energy allowed for electrons in an atom
- 13. ____ Atomic Mass, the weighted-average of an element's isotopes
- 15. Particle of matter that makes up protons and neutrons
- 16. Tiny atomic particle with little mass and a negative electric charge
- 17. A vertical column in the periodic table
Down
- 1. An organized list of all known elements, arranged by atomic number, and property changes
- 3. The small, positively charged center of an atom, contains protons and neutrons
- 6. Tiny atomic particle that is electrically neutral and has about the same mass as a proton
- 7. Atomic ____, the number of protons contained in an atom's nucleus
- 8. Emission _____, a plot of the intensity of radiation emitted from an object over a range of frequencies
- 12. A type of diagram that uses the symbol for an element and dots representing the number of outermost electrons
- 14. Atomic ____, the combined number of protons and neutrons in the nucleus of an atom