Across
- 4. pure substance formed when at least one metal and one non-metal combine
- 5. description of a substance that can be rolled into sheets
- 8. amount of protons in the nucleus of one atom
- 9. pure substance which cannot be broken down into other substances
- 14. chemical combination of two or more elements
- 15. atom that is electrically charged because it has lost or gained electrons
- 17. substance that reacts with another substance in a chemical reaction to create a new substance
- 18. description of a solid that can be stretched into a wire
- 19. combination of symbols that represent a compound, identifies elements
- 20. change in appearance or state of a substance
- 22. chemical reaction when oxygen reacts with a substance forming a new substance
- 24. when a liquid and another liquid form a solid
Down
- 1. pure substance formed when non-metals combine
- 2. element that has both metallic and non-metallic properties
- 3. average mass of an element, mass of one proton or electron
- 6. substance made of only one kind of matter
- 7. smallest part of an element which contains protons, neutrons and electrons
- 10. when two or more substances react to create a new substance
- 11. chemical reaction that releases energy
- 12. chemical reaction that absorbs energy
- 13. new substance produced in a chemical reaction between reactants
- 16. vertical column of elements in the periodic table with similar chemical properties
- 21. layer in which an electron orbits around the nucleus of an atom
- 23. anything that has a mass and occupies space
- 24. horizontal row of elements on the periodic table