Chemistry

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Across
  1. 3. a vertical column of elements in the periodic table; elements in a group share chemical properties
  2. 5. When one or more valence electrons are given from one atom to another atom.
  3. 7. When two ore more atoms combine. This can be 2 of the same atoms or two different atoms (elements).
  4. 8. a combination of two or more substances that are not chemically combined
  5. 11. a substance, body, or device that readily conducts heat, electricity, sound, etc.
  6. 12. the number of protons in the nucleus of an atom; the atomic number is the same for all atoms of an element
  7. 16. capable of being extended or shaped by hammering or by pressure from rollers
  8. 17. Two or more elements that have combined. Most elements are found this way
  9. 19. Regions of space that consecutively surround the nucleus of an atom.
  10. 23. ^The electrons in the outermost shell (main energy level) of an atom; these are the electrons involved in forming bonds.
  11. 25. easily combines with other elements to make new compounds
  12. 27. easily damaged or destroyed; fragile
  13. 28. the ratio of the mass of a substance to the volume of the substance
  14. 29. a subatomic particle that has no charge and is found in the nucleus of an atom
  15. 31. the physical forms of matter, which include solid, liquid, and gas
  16. 32. point the temperature at which a liquid becomes a gas
  17. 33. the state or quality of shining by reflecting light
  18. 34. an element that is dull and that conducts heat and electricity poorly
  19. 35. Symbols that show the elements in a compound and the ratio of atoms
Down
  1. 1. Number of protons and neutrons
  2. 2. point the temperature at which a solid becomes a liquid
  3. 4. a subatomic particle that has a negative charge
  4. 6. does not combine with other elements to make new compounds
  5. 9. The electrons found on the outer shell of an atom. These electrons are used to form bonds with other atoms.
  6. 10. A chemical bond that involves sharing a pair of electrons between atoms in a molecule
  7. 13. an element that is shiny and that conducts heat and electricity well
  8. 14. the ability of a substance to be pulled into a wire
  9. 15. one of the elements of Group 17 of the periodic table; halogens combine with most metals to form salts
  10. 18. elements that have properties of both metals and nonmetals
  11. 20. an atom's central region, which is made up of protons and neutrons
  12. 21. a substance, body, or device that readily conducts heat, electricity, sound, etc.
  13. 22. a horizontal row in the periodic table
  14. 24. one of the elements of Group 18 of the periodic table; noble gases are unreactive
  15. 26. subatomic particle that has a positive charge and is found in the nucleus of an atom
  16. 30. A one or two letter abbreviation for an element