'Periodic Table of Elements' Crossword Puzzle

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Across
  1. 2. First element in the periodic table.
  2. 5. Chlorine.
  3. 6. Carbon dioxide.
  4. 8. Is essential to human life, it is found in the air we breathe and the water we drink.
  5. 10. share characteristics of both metals and non-metals and are also called semimetals, they are semi-conductors, which means that they both envelop and conduct electricity.
  6. 12. They do not conduct heat or electricity very well but have the ability to gain electrons very easily, they are usually brittle and are not easily molded into shapes.
  7. 15. They are all shiny, good conductors of electricity and heat and ost of them are solids.
  8. 16. It is ubicated in the left side of the periodic table.
  9. 20. Is a material system made up of two or more different substances which are mixed but are not chemically bonded together.
Down
  1. 1. Salt is a _________.
  2. 2. Water.
  3. 3. Its symbol is N in the periodic table of elements.
  4. 4. Is a colorless, tasteless and unsmelling gas.
  5. 7. Is an excellent conductor of heat and electricity. It is a soft, yellow, metal with a beautiful brillance.
  6. 9. they are also called inert gases, this group consists in helium, neon, argon, krypton, xenon, and radon.
  7. 11. Is a substance made up of atoms which all have the same number of protons.
  8. 13. Is a metalloid,its chemical element has a symbol Si.
  9. 14. It is a non-metal and a very good conductor or electricity.
  10. 17. potassium.
  11. 18. Are made up of atoms that are held together by chemical bonds.
  12. 19. It consists of a nucleus, which has a positive charge, and electrons that move around the nucleus.