Atoms, periodic table and bonding

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Across
  1. 4. Apart from the first one(where there are 2), how many electrons can be found in a full shell.
  2. 7. What is the word for a combination of 2 metals to make the substance stronger?
  3. 8. What type of bonding is used for 2 metals.
  4. 10. Which subatomic particle is NOT found in the nucleus of an atom?
  5. 11. What is the name of the person who developed the most recent periodic table?
  6. 14. What type of bonding is used for 2 non-metals?
  7. 15. Group 0 in the periodic table.
  8. 16. Group 7 in the periodic table.
  9. 17. Group 1 elements get more reactive as they go ..... the periodic table.
Down
  1. 1. Group 1 in the periodic table.
  2. 2. Noble gases are ....... as they have a full outer shell.
  3. 3. Electrons are found in ....... around the nucleus.
  4. 5. What type of bonding is used for a metal and a non-metal?
  5. 6. The atomic ....... tells us how many protons are in an atom.
  6. 9. Subatomic-particle that has a positive charge.
  7. 12. This group gets less reactive as you go down the periodic table.
  8. 13. The atomic ........ tells us how many subatomic particles are in the nucleus.