Periodic Table and Atoms

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Across
  1. 2. When alkali metals mix with water, they create a strong ___________.
  2. 4. Scientist who organized the periodic table
  3. 6. Smallest particle that makes up everything
  4. 7. Carbon can be found in these substances that create pollution when burned
  5. 8. A alkali metal used in our batteries
  6. 12. _____________ gasses do not want to combine or react because their outer electron shell is full.
  7. 14. These atoms have 7 outer shell electrons and do react strongly
  8. 17. This alkali earth metal is found in our bones, milk and teeth.
  9. 18. This contains both the protons and neutrons in the atom
  10. 20. This Theory says that matter cannot be created or destroyed
  11. 22. The __________ shell can fit 18 electrons
  12. 23. ___________ is the word used to describe how atoms are held together in a bond
  13. 24. _________ cycle is when this gas travels through the atmosphere, animals, waste and soil
  14. 26. This gas is required for respiration
  15. 27. this gas (non-metal) is used to harden tires
  16. 28. This type of metal has characteristics of metals and non-metals.
  17. 30. Alluminum fits in this category of the periodic table because it is not very strong.
  18. 31. Most gasses fit in this category of the periodic table
Down
  1. 1. This is the most common element in the universe
  2. 3. This is where elecctrons live around the atoms.
  3. 5. When a atom contains the same number of protons and neutrons it has this charge
  4. 9. When two atoms combine to make a new substance it is called this
  5. 10. When a metal can transfer electricity or heat
  6. 11. These metals are strong, shiny, and have high melting points
  7. 13. These metals are extremely reactive because they have one outer electron
  8. 15. This gas is known as an inflammable gas
  9. 16. In order to find the number of these, you must take the atomic mass and subtract the atomic number.
  10. 19. When you mix _____________ with chlorine, you create table salt
  11. 21. When a element is able to bend or fold
  12. 25. Burning, Breathing and _________ all require oxygen.
  13. 29. There are 92 natural ____________ on the periodic table