Chemistry 2

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Across
  1. 3. The substance(s) that begin a chemical reaction, what you start with
  2. 6. reaction involving the particles in the nucleus of an atom that can change one element into another element
  3. 8. Reactants __________ products during a chemical reaction
  4. 13. type of nuclear radiation made up of 2 or more elements consisting of 2 protons and 2 neutrons
  5. 16. one or two letter set of characters used to represent an element
  6. 18. process in which radioactive elements are used to destroy unhealthy cells
  7. 22. process of determining the age of an object using the half-life of one or more radioactive isotopes
  8. 25. When an atom __________ one of its negatively charged electrons, it becomes a positively charged ion.
  9. 26. combination of symbols that represent the elements in a compound
  10. 28. Tells you the number of atoms in a molecule or the ratio of elements in a compound
  11. 30. Two or more substances combine to make a more complex one during a chemical reaction
  12. 31. electron that is given off as nuclear radiation
  13. 32. chemical bond formed when one atom steals electrons from another
Down
  1. 1. covalent bond where electrons are shared unequally
  2. 2. type of nuclear radiation made up of high energy waves
  3. 4. Particles and energy that are released from a radioactive nucleus
  4. 5. Reacts with carbon in a replacement reaction
  5. 7. chemical bond formed when two atoms share electrons
  6. 9. chemical reaction that breaks down compounds into simpler products
  7. 10. covalent bond where electrons are shared equally
  8. 11. The length of time needed for half the mass of a radioactive isotope to decay
  9. 12. chemical bond formed when atoms share two pairs of electrons
  10. 14. substance formed as a result of a chemical reaction, what you end with
  11. 15. Matter is not created or destroyed during a chemical reaction
  12. 17. three-dimensional pattern of ions in a solid
  13. 19. Two or more elements trade places with each other during a chemical reaction
  14. 20. ion that is made up of more than one atom
  15. 21. Shows chemical reactions using symbols instead of words
  16. 23. electrically charged particle
  17. 24. atom with the same number of protons and different number of neutrons from other atoms of the same element
  18. 27. The sum of the protons and neutrons in the nucleus of an atom
  19. 29. number in front of a chemical formula that tells you how many molecules of the atoms are present in the reaction.