Chemistry 3.2 Project

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Across
  1. 3. Thomson: used cathode rays to prove that electrons exists
  2. 7. numerical measure of hot or cold.
  3. 9. effect t:formulated by John Tyndall ,Scattering of light through a colloidal system.
  4. 10. negatively charge particle ,J.J Thomson
  5. 11. zero charge particle, James Chadwick
  6. 12. :s a term in physical chemistry and material science refers to substances and mixtures which are in a single phase
  7. 14. tube holder: The main function is to hold test tubes during various experiments. Some experiments entail heating chemicals and you cannot hold the test tube with your bare hands.
  8. 16. :Study of matter
  9. 17. : the quantity of three-dimensional space enclosed by some closed boundary, for example, the space that a substance (solid, liquid, gas, or plasma) or shape occupies or contains.
  10. 18. Anything that occupied space
  11. 19. formulated an atomic theory
  12. 22. Crookes: cathode ray tubes
  13. 24. law :A law in chemistry , the elements when arrange in the order of their atomic numbers show a periodic variation of atomic structure& most of their properties.
  14. 26. two element form a single compound
  15. 27. Bohr :made the planetary model of the atom,use atomic spectra
  16. 28. basic unit
Down
  1. 1. a unit of measurement used in chemistry to express amounts of a chemical substance, defined as the amount of any substance that contains as many elementary entities (e.g., atoms, molecules, ions, electrons) as there are atoms in 12 grams of pure carbon-12 (12C), the isotope of carbon with relative atomic mass 12. This corresponds to the Avogadro constant, which has a value of 6.02214129(27)×1023 elementary entities of the substance.
  2. 2. a chemical substance whose aqueous solutions are characterized by a sour taste, the ability to turn blue litmus red, and the ability to react with bases and certain metals (like calcium) to form salts. Aqueous solutions of acids have a pH of less than 7.
  3. 4. New lands : invented octaves
  4. 5. that result from the neutralization reaction of an acid and a base
  5. 6. :a mixture is made of different substances that remain physically separate.
  6. 8. : the number of moles of solute dissolved in one liter of solution. The units, therefore are moles per liter, specifically it's moles of solute per liter of solution.
  7. 13. Method :A way of investigating & solving problems by step procedure
  8. 15. :a type of homogeneous mixture in which the dispersed particle do not settle out & a dispersing medium
  9. 19. Mendeleev :The father of modern periodic able
  10. 20. they have definite number of atoms & they are chemically combined.
  11. 21. Name :Trivial Name
  12. 23. Döbereiner : he invented the triads (according to there similar physical & chemical activity)
  13. 25. :positively charge particle, Eugene Gold stein
  14. 26. Neutralize acid to form a salt-turns blue litmus paper