Across
- 3. of acidity or basicity of a solution. (pH)
- 6. type of pure substance, consisting of only one kind of atom. (Element)
- 7. used to measure the amount of a substance in chemistry. (Mole)
- 8. of protons in an atom. (Atomic number)
- 9. columns on the periodic table. (Groups)
- 11. of matter with a definite volume but no definite shape. (Liquid)
- 13. that absorbs heat energy. (Endothermic)
- 16. rows on the periodic table. (Periods)
- 17. of chemical bond where electrons are shared. (Covalent)
- 18. charged particle in an atom. (Proton)
- 19. unit of a chemical element that retains its chemical properties. (Atom)
Down
- 1. of reaction where oxygen reacts with a substance, often producing heat and light. (Combustion)
- 2. who developed the modern atomic theory. (Dalton)
- 4. who created the first periodic table. (Mendeleev)
- 5. that speeds up a chemical reaction without being consumed. (Catalyst)
- 8. charged particle of an atom. (Electron)
- 10. needed to start a chemical reaction. (Activation energy)
- 12. of a solid turning directly into a gas. (Sublimation)
- 14. reaction where one element replaces another in a compound. (Single replacement)
- 15. stating that mass is neither created nor destroyed in a chemical reaction. (Conservation)