Structures and Changes Vocabulary

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Across
  1. 3. when two or more substances chemically combine and form a new substance
  2. 6. when more than one atom chemically combines
  3. 8. alters the form of a substance but does not change it into a new substance with new properties
  4. 10. positive and is in the nucleus
  5. 11. a substance that is made of two or more elements chemically combined. Can only be broken apart by chemical reaction
  6. 13. a characteristic that can be observed or measured. Ex: texture
  7. 17. smallest unit of an element
  8. 19. neutral and in the nucleus
  9. 20. negative and goes around the nucleus
Down
  1. 1. a characteristic that enables a substance to undergo a chemical change. Ex: flammability
  2. 2. first to discover atoms
  3. 4. greek word means indivisible
  4. 5. vertical columns on the periodic table that are organized by similar properties
  5. 7. the amount of matter in a chemical reaction does not change, so the total mass of the reactants must equal the total mass of the products
  6. 9. a substance that is made up of only one kind of atom
  7. 12. the # of protons and neutrons in the nucleus
  8. 13. new substances that are made during the reaction
  9. 14. the process of one or more substances converting to form new substances with different properties
  10. 15. materials that are needed to start the chemical reaction
  11. 16. center of an atom that contains protons and neutrons
  12. 18. horizontal rows on the periodic table that are organized by atomic #