Chemistry Vocabulary Review

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Across
  1. 5. the mass of an element's atom
  2. 6. anything that takes up space and has weight
  3. 7. when atoms of two substances connect to each other to make a compound
  4. 8. an element that is not magnetic, malleable, or ductile, and conducts electricity poorly or not at all
  5. 12. the chart we use to display all 118 known elements in the universe
  6. 18. a substance formed when the atoms of two or more elements bond
  7. 19. a subatomic particle that has no charge and makes up a nucleus
  8. 21. a property of metal; means that this substance can be flattened into sheets without breaking
  9. 22. when two or more substances come together without any bonding or reaction (for example, air or sea water)
  10. 23. the center of an atom
  11. 24. a pure substance made of only one type of atom
  12. 27. an element that is magnetic, malleable, ductile, and conducts electricity
Down
  1. 1. a subatomic particle that has a positive charge and makes up a nucleus
  2. 2. a mixture with different consistency (easier to tell the different components apart)
  3. 3. a property of an element; how good it is at allowing electricity to pass through it
  4. 4. happens when substances come together and create a brand new substance, changing at an atomic level (usually results in an explosion or a change in temperature or color)
  5. 9. a subatomic particle that is negatively charged and revolves around the nucleus
  6. 10. the number of protons and electrons in the atom of an element
  7. 11. an element with properties of both a metal and a nonmetal
  8. 13. a property of an element; does it attract or repel other materials?
  9. 14. a property of metal; means that this substance can be stretched into wire without breaking
  10. 15. particle that makes up matter and is made up of different atoms
  11. 16. changes the way a substance looks but does not change the atoms (for example, breaking a pencil in half or melting an ice cube)
  12. 17. a mixture with a similar consistency (hard to tell the different components apart)
  13. 20. a particle that makes up all matter and is made up of protons, neutrons, and electrons
  14. 25. a property of an element; the temperature at which it changes from solid to liquid
  15. 26. any of the elements in the 18th group of the periodic table (such as helium or carbon), which rarely react but glow when exposed to energy