Science Study Guide

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Across
  1. 1. The center of an atom that contains neutrons and protons
  2. 5. The process of when the element emits particles
  3. 7. Negatively charged particles in the electron cloud
  4. 9. Very reactive nonmetals in group 17 of the Periodic Table
  5. 13. The number of protons in an element
  6. 17. Found in group 18 and are the least reactive elements
  7. 18. They are reactive and are in group 2
  8. 22. They are very reactive with group 17 and are in group 1
  9. 23. The process of an atom becoming stable
  10. 24. An element with more or less electrons than the original element
Down
  1. 2. Outside the nucleus and is where the electrons can be found
  2. 3. An element with more electrons than protons
  3. 4. Elements 90 thru 103 and are separated from the Periodic Table
  4. 6. A positively charged particle that determines the atomic number of the element
  5. 8. They are uncharged particles that are found in the nucleus
  6. 10. Elements 58 thru 71 and are separated from the Periodic Table
  7. 11. A vertical column in the Periodic Table of Elements and those elements have similar properties
  8. 12. Elements that are not metals and have opposite properties of metals
  9. 14. They are good conductors of heat and electricity and are almost always solids.
  10. 15. A horizontal line in the Periodic Table of Elements
  11. 16. Good conductors of heat and electricity and have properties of both nonmetals and metals
  12. 19. A unit of measurement for measuring the mass of an atom
  13. 20. An atom with more protons than electrons
  14. 21. An element that has more or less neutrons than the original element