Chemistry Midterm Vocab

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Across
  1. 3. the ability of an atom to attract and hold an electron
  2. 7. the ability to achieve the correct results each time
  3. 9. a change that occurs, causing the substances involved to change
  4. 12. substance consisting of only one type of atom
  5. 13. atoms that have different mass numbers due to different amounts of neutrons
  6. 14. The periodic table is arranged by ________.
  7. 15. the neutral particle in an atom's nucleus
  8. 17. when two substances under go a chemical change, it can be written in mathematical form, called a chemical ________
  9. 19. the units used when measuring mass
  10. 20. most metals in the periodic table belong to this family
  11. 22. the electrons that are found in the outermost orbit are called the __________ electrons
  12. 23. a charged atom
  13. 24. the type of reaction or change that puts off heat
  14. 25. two substances that are chemical bonded
  15. 26. the ability of an atom to lose an electron is called _________ energy
  16. 27. this family of elements seems to be an exception to many rules
Down
  1. 1. the amount of mass per unit of volume of a substance
  2. 2. two substances that can be separated via a chemical means
  3. 3. this family of elements has only one valence electron: _______ earth metals
  4. 4. the ability of an atom to attract an electron in a chemical bond
  5. 5. the amount of space something takes up, measured in liters
  6. 6. the number of protons plus neutrons equals the atomic __________
  7. 8. a mixture in which the different components can be seen
  8. 10. the negatively charged particles that reside outside the atom's nucleus
  9. 11. the positive particles found in an atom's nucleus
  10. 16. the ability to achieve the same results each time
  11. 18. a change that occurs without changing the substance
  12. 21. all of the elements are arranged by atomic number/number of protons in the ________ table of elements