Physical Science Review

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Across
  1. 3. an atom that has gained electrons, a negative nonmetal ion
  2. 4. a chemical reaction that has the same number and kinds of elements in both the product and reactant
  3. 6. majority of elements on the periodic table. Tend to lose electrons and form positive ions
  4. 7. chemical reaction with ONE PRODUCT A + B --> AB
  5. 10. number in front of a formula used to balance the reaction
  6. 11. an atom that has lost electrons, a positive metal ion
  7. 13. lowest ratio of ions in an ionic compound
  8. 15. neutral particle in the nucleus of an atom
  9. 18. bond formed when a metal atom gives an electron to a nonmetal atom
  10. 19. chemical reaction between an organic compound and oxygen CHO
  11. 21. bond formed when two or more nonmetal atoms share electrons
  12. 22. atoms of the same element with different numbers of neutrons
  13. 23. ___ replacement, chemical reaction between two ionic compounds AB + CD --> AD + CB
  14. 24. elements that tend to gain electrons and form negative ions
Down
  1. 1. chemicals that are used in a reaction
  2. 2. positive particle in the nucleus of an atom
  3. 5. negative particle in the space outside the nucleus of an atom
  4. 8. electrons in the outermost energy level that participate in bonding
  5. 9. chemical reaction with ONE REACTANT AB --> A +B
  6. 12. an atom that has gained or lost one or more electrons
  7. 14. carbon compounds with the same chemical formula but different molecular shapes
  8. 16. elements that have full valence shells. Group 18
  9. 17. chemicals that are formed in a reaction
  10. 20. ___ replacement, chemical reaction between a compound and a SINGLE ELEMENT AB + C --> AC + B
  11. 25. particle formed by covalent compounds