UNIT 3 OF SCIENCE WORLD

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Across
  1. 4. Group VIIA also known as?
  2. 5. Mendeleev and __ received a Davy medal for their great contributions to chemistry.
  3. 6. What is an early form of the investigation of nature?
  4. 7. French name for sulfur.
  5. 8. The periodic table consists of several horizontal rows called ___.
  6. 9. He called his device telluric helix.
  7. 13. Inner transition elements are the last ___ periods.
  8. 14. He arranged the list of 33 elements into 4 categories.
  9. 15. Group 1A also known as?
  10. 17. Alchemists preserved their work with confidentially through the use of ___.
  11. 18. It is the ability of atoms to lose electrons.
  12. 20. The vertical columns in the periodic table is called groups or ____.
Down
  1. 1. ____ is a German chemist who studied 3 elements and noticed similarities among the properties of metals such as Ca,Ba,and Sr.
  2. 2. Elements can be classified as metals, nonmetals and ____.
  3. 3. Phosphore is the french name for ___.
  4. 10. They are salifiable simple earth substances.
  5. 11. They are oxydable and acidifiable simple substances not metallic,
  6. 12. It is the energy required to remove an electron from isolated,gaseous, atom or ion in its ground state.
  7. 16. What was the name given to nitrogen?
  8. 19. Known in different aspects and one of there as their popular culture, the process of changing some elements into gold.