Matter and Periodic Table review

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Across
  1. 1. Salt former elements that have elements that exist in all three states of matter.
  2. 3. Very reactive metals, not found freely in nature and the second column on the periodic table.
  3. 8. Gasses that do not easily form compounds.
  4. 10. The ____ number is what we get when we add the protons and neutrons together.
  5. 13. The positive subatomic particle in an atom.
  6. 14. The ______ ______ metals are radioactive and mostly mad-made elements.
  7. 15. This is what the periodic table is organized by.
  8. 16. The electron ____ is where all of the electrons of an atom are found.
  9. 18. This is the state of matter most of the elements are found in at room temperature.
  10. 20. Where the protons and neutrons are found in an atom.
  11. 23. The neural subatomic particle in an atom.
  12. 24. Elements and ____ are the two types of pure substances.
Down
  1. 2. First group of elements that are very reactive and can explode when exposed to water.
  2. 4. All of these are found on the periodic table.
  3. 5. Have properties of both metals and non-metals.
  4. 6. The negative sub atomic particle of an atom.
  5. 7. This is the state of matter that the noble gasses are found in at room temperature.
  6. 8. Poor conductors of electricity and heat, typically dull and many are found as gasses.
  7. 9. The _____ metals conduct electricity and heat well, an example of these elements would be Iron and Copper.
  8. 11. Good conductors of heat and electricity are shiny, ductile and malleable.
  9. 12. Another name for a group on the periodic table because they have similar properties.
  10. 17. When two or more types of matter are mixed together.
  11. 19. Mercury and Bromine are the two elements found in this state at room temperature.
  12. 21. A row on the periodic table.
  13. 22. A column on the periodic table.