The Fundamentals of Chemistry

Edit Answers
12345678910111213141516171819202122232425
Across
  1. 2. less reactive than alkali metals.
  2. 3. a positively charged particle.
  3. 4. when an atom gains an electron.
  4. 5. very reactive, important for life.
  5. 7. the vertical rows on the periodic table.
  6. 8. when atoms have different numbers of neutrons.
  7. 9. when an atom loses an electron.
  8. 12. shows all possible locations of electrons
  9. 13. atomic mass unit
  10. 17. an uncharged (neutral) particle.
  11. 18. when an atom gains or loses one or more electrons.
  12. 20. a rare earth element.
  13. 21. when atoms produce energy and particles.
  14. 23. almost never react, found in atmosphere.
  15. 24. negatively charged, circle around the nucleus.
  16. 25. in groups 3 and 12, copper,gold,etc.
Down
  1. 1. very reactive,used to kill microorganisms.
  2. 6. the number of protons within an element.
  3. 10. series 90-103
  4. 11. the center of an atom, has protons and neutrons
  5. 14. have properties of metals and nonmetals.
  6. 15. the horizontal rows on the periodic table.
  7. 16. elements that have a shiny look and conduct heat.
  8. 19. when radiation decays something ?
  9. 22. have dull surfaces and cannot be shaped.