Across
- 4. Table A chart that organizes elements by atomic number and properties.
- 5. A disturbance that transfers energy through matter or space.
- 9. Spectrum The part of the electromagnetic spectrum that we can see.
- 10. A starting material in a chemical reaction.
- 12. Positively charged particle in the nucleus of an atom.
- 13. A combination of substances not chemically bonded.
- 16. The smallest unit of matter that retains the properties of an element.
- 17. Change A change in appearance, not in substance.
- 19. A substance made of only one kind of atom.
- 22. The number of waves that pass a point in a second.
Down
- 1. A new substance formed in a chemical reaction.
- 2. The distance between two wave crests.
- 3. The height of a wave; related to energy.
- 6. Mass divided by volume.
- 7. When a wave’s energy is taken in by the material.
- 8. Neutral particle found in the nucleus.
- 11. Equation Symbols showing what happens in a chemical reaction.
- 14. Number The total number of protons and neutrons in an atom’s nucleus.
- 15. Two or more atoms bonded together.
- 18. A substance formed when two or more elements are chemically joined.
- 20. Tiny, negatively charged particle that orbits the nucleus.
- 21. Change A change that produces a new substance.