Unit 3 Sample work

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Across
  1. 1. The number of protons in the atom
  2. 6. A rule that states that molecules and atoms cannot be created or destroyed, only rearranged.
  3. 7. A change that does not result in any new substances being formed.
  4. 8. A row of elements in the periodic table
  5. 9. Finding patterns in data
  6. 10. Two or more substances reacting to form one or more new substances.
  7. 11. A collection of elements that behave or look alike because they all have the same amount of valence electrons
  8. 12. A subatomic particle that has a negative charge and orbits around the nucleus
  9. 16. What holds atoms together to form molecules
  10. 19. A list of all of the atoms in a molecule.
  11. 25. neutrons and protons in the center of the atom
  12. 27. Something's ability to combine or change into one or more new substances
  13. 29. Nonreactive
  14. 30. subatomic particle that is positively charged
  15. 31. A group of atoms that make up a substance
  16. 33. The substances before a chemical reaction.
  17. 34. Look at your results to see if they support your hypothesis
  18. 35. The process by which plants make energy from, light, water, and carbon dioxide.
  19. 37. Shows the atoms that make up the molecule.
  20. 38. A prediction on observations that can be tested
Down
  1. 2. How many neutrons and protons are in an atom
  2. 3. Elements in the second column of the periodic table that are silvery white metals, that have 2 valence electrons, are reactive and have low melting and boiling points
  3. 4. The elements something is made of
  4. 5. An intermolecular bond
  5. 13. Conclusions Deciding what patterns mean in data
  6. 14. Two or more chemical elements bonded together
  7. 15. A structure of multiple atoms connected together such as sodium chloride.
  8. 17. A toxic and reactive non-metal found in group 17 of the periodic table
  9. 18. something that results in a different substance in an irreversible process.
  10. 20. The orbiting electrons outside of the nucleus
  11. 21. The group of elements that are found in the first column of the periodic table and are soft, silvery, have one valence electron, and are very reactive
  12. 22. The outside electron shell.
  13. 23. Trying to find meaning in data
  14. 24. A property that can be measured
  15. 26. A subatomic particle with no charge
  16. 28. A charged particle that was made when an electron was added or lost from an atom or group of atoms
  17. 32. The outcome of a chemical reaction.
  18. 36. A group of elements on the periodic table that are nonreactive and inert