Year 10 Chemistry Week 3

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Across
  1. 2. These particles make up everything.
  2. 3. ________ metals are found in groups 3 - 12 and can have multiple different charges/valencies and so they can include their charge in their name, i.e. Lead (IV) Pb4+.
  3. 5. These compounds contain metals and non-metals.
  4. 6. This is the name for electrons found in the outhermost shell, ____ electrons.
  5. 10. This refers to a column of the periodic table.
  6. 11. In a neutral atom, the number of protons is _____ to the number of electrons.
  7. 12. Group 18 is called the ____ or inert gases, because they do not react having already filled their valence shell.
Down
  1. 1. This subatomic particle has a positive charge.
  2. 2. The number of protons is the ______ number of an element.
  3. 4. This is the maximum capacity of the first electron shell.
  4. 5. When an atom becomes charged, it is called an _____.
  5. 7. ______ metals are found in group 1 and are the most reactive metals.
  6. 8. This is the maximum capacity of the second electron shell.
  7. 9. This subatomic particle is found in the nucleus but does not have a charge.