chemistry crossword

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Across
  1. 5. the interactions of substances as studied in chemistry.
  2. 6. A number written at the lower right corner behind the element
  3. 9. Group 2 from the left side of the metals, very reactive and not found free in nature
  4. 11. Group 1 in the left side of the metals, extremely reactive and are only found in the nature as compounds, not hydrogen
  5. 14. Occurs when 2 elements in different compounds trade places
  6. 15. the arrow in the middle of the equation
  7. 16. A positively and negatively charged atom
  8. 18. Group 17 on the right side of non-metals, most reactive non-metals and only appears as compounds in nature, often found on living things
  9. 20. negatively charged ion
  10. 21. bonds a bond between a positive and negative charged ions
  11. 23. The horizontal rows on the periodic table
  12. 25. the branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.
  13. 26. The sharing of molecules
  14. 28. a simple substance that cannot be broken down into smaller parts or changed into another substance
  15. 29. Group B elements
  16. 31. A compound which is held together by ionic bonds (metal and non-metal)
Down
  1. 1. not good conductors and on the right side of the stairs
  2. 2. When a substance changes its state (changes to a solid, liquid , gas, or plasma) or is modified (size, shape, etc) but remains the same substance.
  3. 3. Group 1 from the right side in the non-metals, outer orbit is full, almost totally unreactive, doesn't form compounds
  4. 4. The sharing of electrons (covalently bonds)
  5. 7. describes an object's ability to repel or attract other objects.
  6. 8. the points that separate the metals and nonmetals
  7. 10. when substances interact with each other.
  8. 12. Number in front of a compound's chemical formula telling you how many molecules of that compound are needed.
  9. 13. change of an element into a different element, usually with some other particle(s) of energy emitted
  10. 17. A chemical combination of 2 or more of the same atoms.
  11. 19. The vertical columns on the periodic table.
  12. 20. Is the basic unit of an element. It is a form of matter which may not be further broken down using any chemical means
  13. 22. a substance formed when two or more chemical elements are chemically bonded together
  14. 24. good conductors of heat and electricity on the left side of the stairs
  15. 27. positively charged ion
  16. 30. Elements that have properties of both metals and nonmetals.