Chemistry - MT 1

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Across
  1. 2. particles of light
  2. 3. a negatively charged ion
  3. 5. unit of energy
  4. 10. a positively charged ion
  5. 12. elements found between metals and nonmetals
  6. 15. bonds formed when atoms share electrons
  7. 18. a mixture in which substances are evenly distributed throughout the mixture
  8. 20. a horizontal row of elements on the periodic table
  9. 21. 0 kelvin
  10. 23. elements found to the left side of the periodic table
Down
  1. 1. a reaction that absorbs energy in the form of heat
  2. 3. group 1 elements
  3. 4. group 17 elements
  4. 6. smallest particle of an element
  5. 7. Avogadro's number of anything
  6. 8. anything that has mass and takes up space
  7. 9. groups of two or more atoms held together by chemical bonds
  8. 11. elements found at the far right side of the periodic table
  9. 13. a chemical reaction that gives off heat
  10. 14. groups 3-12 on the periodic table
  11. 15. the study of the properties of matter and how matter changes
  12. 16. bonds resulting from the attraction between oppositely charged ions
  13. 17. atoms of the same element with different numbers of neutrons
  14. 19. a region in an atom where there is a high probability of finding electrons
  15. 22. a number written slightly below and to the right of a chemical symbol that shows how many atoms of an element are in a compound