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Introductory Chemistry
Molecular Compounds
Revised July 19, 2010 all rights reserved
| These questions are a quick overview of the topics in this lesson. You are not expected to know this material before hand. The questions are intended to help you focus on material in the lesson. After you have studied the lesson you should be able to answer these and even more complicated questions. |
1. The
covalent bond exists between atoms that share electrons. 2. The
atoms in a molecule have no repulsions between atomic nuclei. 3. The
distance between atoms in a molecule is called the bond length.. 4. Hydrogen
normally forms one bond. 5. A
molecule contains atoms of the same type. 6. A
single covalent bond exists when two atoms share an electron. 7. A
triple bond is weaker than a single bond. 8. Nitrogen
can form single, double and triple covalent bonds. 9. The
C-O bond is more polar than the C-F bond. 10. The
group number for a nonmetal element indicates the number of bonds it
can form. 11. The
valence electrons on an atom in a molecule are tied to the original
atom. 12. Lewis
structures show atom symbols and valence electrons. 13. The
tetrahedron is the basic shape for molecules like CH2CH2, ethylene. 14. Water
molecules have a linear or straight shape with angles of 180 degrees. 15. The
least electronegative element is fluorine. 16. Polar
molecules have atoms that share electrons equally. 17. The
number four is indicated by the prefix "penta-". 18. The
electron configuration for the six electrons in carbon is 1s22s22p2 19. The
bond angles in methane CH4 are ninety degrees. 20. Carbon
monoxide is a polar molecule with the oxygen end being slightly positive.