Across
- 1. two or more substances physically combined
- 2. a substance that enters into a chemical reaction
- 5. a negatively charged particle in an atom
- 12. a reaction in which elements in different compounds trade places
- 13. solids with particles not arranged in a pattern
- 14. going directly from a solid to a gas
- 15. name of group 1 metals
- 16. a mixture of a metal and another element
- 19. a compound that consists of positive and negative ions
- 20. a single type of matter that is pure
- 22. the number before a chemical formula in an equation
- 26. the measure of the amount matter in an object
- 27. an atom with the same number of protons and a different number of neutrons
- 29. a chemical bond formed by sharing electrons
- 30. ionic compound formed in a reaction between n acid and a base
Down
- 1. the basic particle of a compound
- 3. a substance that produces hydroxide ions in water
- 4. the attraction that holds two atoms together
- 6. a substance made of two or more elements combined
- 7. a class of elements that are shiny
- 8. type of change that forms new substances
- 9. going directly from a liquid to a gas
- 10. solids with particles arranged in patterns
- 11. an element with some properties of both metals and nonmetals
- 17. an electrically charged atom
- 18. the study of matter
- 20. the number in a chemical formula showing the ratio of atoms in a compounds
- 21. symbols that show the type and number of atoms in a compound
- 23. an element without the properties of a metal
- 24. an element in group 17
- 25. the basic particle of an element
- 28. a substance that produces hydrogen ions in water