Chemistry Unit 3

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Across
  1. 2. This theory states that repulsion between electron pairs causes molecular shapes to adjust.
  2. 7. mole Hydrogen, Oxygen, Nitrogen, Fluorine, Chlorine, Bromine, and Iodine are the 7 __________ elements.
  3. 10. Bases produce ___________ ions when dissolved in water
  4. 11. Most ionic compounds are __________ solids.
  5. 12. bonds This bond is the strongest out of all intermolecular forces.
  6. 13. _______ interactions only occurs in polar molecules
  7. 16. These are formed when atoms lose 1 or more valence electron
  8. 17. What is composed of cations and anions and are electrically neutral?
  9. 18. How many bonds does a tetrahedral molecule have?
  10. 19. Molecular compounds tend to have _____ melting and boiling points
  11. 20. Which bond involves sharing of electrons?
Down
  1. 1. Single bonds are the _________ and the longest
  2. 3. A group of atoms with a positive or negative charge are called ___________ ions
  3. 4. Triple bonds are the ________ and the shortest
  4. 5. This compound is composed of two elements
  5. 6. What determines the chemical properties of an element?
  6. 8. What structure is used to show valence electrons in an atom as dots?
  7. 9. A binary ________ compound is composed of two nonmetals
  8. 10. What polyatomic ion is this called?: OH¯
  9. 14. What polyatomic ion is this called?: CrO₄²⁻
  10. 15. Acids contain one or more what to produce hydrogen ions?