The Fundamentals of Chemistry

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Across
  1. 2. atomic mass unit
  2. 3. NUMBER The number of protons in a nucleus
  3. 4. 90-103 elements that are set apart from the rest of the periodic table
  4. 7. An atom that gained or lost electrons
  5. 8. METALS Group 1 periodic table metals that are very reactive
  6. 9. A positively charged particle
  7. 13. A vertical column on the periodic table
  8. 14. Rare earth metals that are actually not that rare
  9. 17. the process by which the nucleus of an atom element releases energy and particles
  10. 18. an element that has properties of both metals and nonmetals
  11. 19. Shiny and solid elements that conduct electricity and heat well
  12. 20. Atoms of the same element that have a different number of neutrons
  13. 21. GASES almost never react with other elements
  14. 22. the central region of an atom where most of the atom's mass is found in protons and neutrons is found in protons and neutrons
  15. 23. DECAY The change in number of protons of an atom
  16. 24. A negatively charged particle
Down
  1. 1. very reactive non-metals that easily form compounds called salts
  2. 5. Elements on the right side of the periodic table that are gases or liquids
  3. 6. METALS group 2 in the periodic table, not very reactive
  4. 10. METALS Elements in Group 3-2 of the periodic table that are less reactive than most other metals
  5. 11. ION An atom that is smaller than the atom that formed it
  6. 12. horizontal row of the periodic table
  7. 15. ION If an atom gains an electron
  8. 16. CLOUD A group of electrons that are outside of the nucleus
  9. 22. a particle that has no electric charge and is located in the atom's nucleus