Unit 7: Elements and Compounds

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Across
  1. 2. A simple unit of an element
  2. 6. An oxygen and hydrogen atom that's bonde together and found in most bases
  3. 7. It describes the molecule or substance; eg carbon dioxide
  4. 8. A column in the periodic table
  5. 10. You can see all the elements here
  6. 11. A row across in the periodic table
  7. 14. A group of atoms that are bonded together; they can be the same or different atoms
  8. 16. It is an element in group one in the periodic table
Down
  1. 1. It uses symbols to show how many atoms are in a molecule or compound
  2. 2. Group 1 elements that dissolve in water
  3. 3. The chemical name for table salt
  4. 4. This gas is the product of photosynthesis and is needed for respiration
  5. 5. This is a noble gas in the last group and makes balloons float
  6. 9. To join atoms together
  7. 12. A short way of writing something
  8. 13. A pure substance with only one type of atom
  9. 15. A substance with two or more different atoms bonded together