Chemistry

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  1. 2. the chemical element of atomic number 72
  2. 3. a concentration unit, defined to be the number of moles of solute divided by the number of liters of solution.
  3. 5. Usually the term is applied to an ionic compound produced by reacting an acid with a base.
  4. 7. an optical instrument used for viewing very small objects
  5. 8. An expression which states the number and type of atoms present in a molecule of a substance.
  6. 10. chemical element with symbol Cn and atomic number 112. It is an extremely radioactive synthetic element that can only be created in a laboratory
  7. 13. chemical element is a measure of the size of its atoms
  8. 15. hold the test tubes and keep them in a secure position without being held by hand
  9. 17. to heat material for experiments
  10. 19. used to hold the test tube
  11. 21. the forces between particles that are caused by their electric charges.
  12. 24. Father of Science
  13. 25. abbreviation of Iron
  14. 26. chemical element with symbol Ba and atomic number 56
  15. 27. the chemical element of atomic number 86
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  1. 1. the branch of science that deals with the identification of the substances of which matter is composed
  2. 4. a balance consisting of a lever with two equal arms and a pan suspended from each arm
  3. 6. They may be represented by X + Y → XY Combination reactions are usually exothermic.
  4. 9. has a definite volume, it does not have a definite shape.
  5. 11. chemical element with symbol Hs and atomic number 108, named in honor of the German state of Hesse
  6. 12. an atom or molecule is defined as the amount of energy released when an electron is added to a neutral atom
  7. 14. physical substance in general, as distinct from mind and spiri
  8. 16. a lipped cylindrical glass container for laboratory use.
  9. 18. a unit of concentration, defined to be equal to the number of moles of solute divided by the number of kilograms of solvent.
  10. 19. the chemical element of atomic number 52
  11. 20. state of matter consisting of particles that have neither a defined volume nor defined shape.
  12. 22. measuring and indicating temperature
  13. 23. able to dissolve other substances
  14. 24. a chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus red; typically, a corrosive or sour-tasting liquid of this kind.
  15. 26. a chemical species that donates electrons or hydroxide ions or that accepts protons.