Maddie Roberts

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Across
  1. 2. a substance formed when two or more chemical elements combine in a fixed ratio
  2. 5. structure of an atom
  3. 9. has a pH greater than 7
  4. 12. a charged atom or molecule
  5. 13. Atoms with the same number of protons but different numbers of neutrons
  6. 18. Vertical columns on the periodic table
  7. 19. a variable that stands alone and isn't changed by the other variables you are trying to measure
  8. 20. consist of a nucleus proton and neutron
  9. 21. a negatively charged ion
  10. 23. Horizontal row on the periodic table
  11. 24. relies on another variable
  12. 25. A substance with high electrical conductivity, luster, and malleability,
  13. 26. A scale that says how acidic or basic something is
  14. 27. Circles around the nucleus
  15. 28. Releases heat
Down
  1. 1. a conclusion reached on a basis of evidence and reasoning
  2. 3. observing something
  3. 4. Takes heat in
  4. 6. a representation of a chemical compound
  5. 7. changes appearance after a reaction
  6. 8. A mass of an atom
  7. 10. unpaired valence electrons
  8. 11. Lacks characteristic of a metal
  9. 13. Shares valence electrons with other atoms
  10. 14. a chemical that gives off hydrogen ions
  11. 15. the number of a chemical
  12. 16. A chemical reaction between an acid and a base
  13. 17. forms a new substance when a reaction happens
  14. 22. Electrons in the outer shell of an atom
  15. 25. an orbit that electrons follow around an atom's nucleus.