What is matter?

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Across
  1. 2. 1 g/mL is the _______ of water
  2. 6. Pb
  3. 8. Sr
  4. 12. Ce
  5. 13. Mn
  6. 14. the temperature at which a liquid becomes a gas (two words)
  7. 16. Mg
  8. 17. a substance made of atoms of two or more different elements that are chemically combined
  9. 18. Pt
  10. 20. Hg
  11. 21. Sb
  12. 22. a combination of two or more substances that are not chemically combined
  13. 23. the smallest unit of an element that maintains the properties of that element
  14. 24. the ability of a substance to react in the presence of oxygen and burn when exposed to a flame
  15. 25. Cs
  16. 26. Sn
Down
  1. 1. Ti
  2. 3. N
  3. 4. CO2 and H20 are the _________ for these molecules
  4. 5. The substances of a mixture aren’t mixed uniformly and are not evenly distributed.
  5. 7. a substance that cannot be separated or broken down into simpler substances by chemical means
  6. 8. _____ for elements are always a single capital letter or a capital letter followed by a lowercase letter
  7. 9. Fe
  8. 10. what things are made of, what their properties are, and how they interact and change
  9. 11. smallest unit of a substance that keeps all of the physical and chemical properties of that substance
  10. 15. the components of a mixture are evenly distributed, and the mixture is the same throughout
  11. 16. the temperature and pressure at which a solid becomes a liquid
  12. 19. is anything that has mass and occupies space.