Chemistry

123456789101112131415161718192021222324252627282930
Across
  1. 2. how poisonous a substance is
  2. 7. a row across the periodic table
  3. 8. the ability of a substance to catch fire
  4. 10. a characteristic or feature of a substance
  5. 16. the ability of a substance to be drawn into wire4s
  6. 17. occurs when a substance changes to produce a new substance
  7. 18. a substance used up in a chemical reaction
  8. 19. a particle in which two or more atoms of different non-metal elements are chemically bonded together
  9. 20. both a philosophy and ancient practice of science; alchemists attempted to turn base elements into preciou metals and to create a substance that would provide immortality
  10. 21. the breakdown of a metallic substance due to a chemical reaction with substances in the environment, such as oxygen and water
  11. 22. a green patina caused by the reaction of copper with air or sea water over a long period of time
  12. 23. a large molecule made up of small repeating subunits chemically bonded together
  13. 24. occurs when the form of a substance changes, but the kind of substance remains the same; foe example, a change of state and dissolving
  14. 29. a molecule consisting of two atoms ('di-' meaning 'two'; 'atomic' meaning 'atom')
  15. 30. a substance made up of the same type of particle
Down
  1. 1. a plastic made from starch derived from plants such as corn and potato
  2. 3. the properties of substance that can be observed or examined without changing the composistion of a substance
  3. 4. the ability of a substance to transfer electricity: good electrical conductors transfer electricity well; poor electrical conductors (insulaters) transfer electricity poorly
  4. 5. a particle in which two or more atoms of the same non-metal elements are chemically bonded together
  5. 6. a column down the periodic table
  6. 9. does not break down
  7. 11. the properties that show how a substance reacts when combined with other substances
  8. 12. a letter (or letters)of the alphabet used to represent an atom of a specific element
  9. 13. the ability of a substance to transfer heat: good heat conductors transfer well; poor heat conductors (insulators) transfer heat poorly
  10. 14. how shiny a material is
  11. 15. a pure substance made up of only one type of atom; cannot be broken down into a simpler substance
  12. 17. a collection of symbols and numbers that represents the number of atoms in a particle of an element or compound
  13. 19. the ability of a substance to bend or be hammered into different shapes
  14. 24. a new substance produced in a chemical reaction
  15. 25. when the chemical make-up of a substance changes, and a new substance or substances sre formed
  16. 26. a pure substance made up of two or more different atoms chemically bonded together
  17. 27. a compound produced when iron reacts with oxygen and water in the atmoshere
  18. 28. a substance made up of different types of particle, physically combined