Unit 4 Quiz (PDF)

Name: ___________________________________ Date: ____________ Class period: ______ Unit 4 Quiz A 1. A triple covalent bond shares ___________ electrons between atoms. A. two D. five B. three...

Name: ___________________________________ Date: ____________ Class period: ______ Unit 4 Quiz A 1. A triple covalent bond shares ___________ electrons between atoms. A. two D. five B. three E. six C. four F. Unable to tell 2. Which of the following sets of atoms can be joined by a covalent bond? A. Be and F D. Mg and Na B. Na and Cl E. Li and Cl C. S and F F. None of these 3. Which of the following elements does not want to have eight valence electrons? A. magnesium D. hydrogen B. oxygen E. nitrogen C. fluorine 4. The correct formula for the bond between Calcium and Nitrate is… A. Ca(NO3)2 C. CaN2 B. Ca2NO3 D. CaNO2 5. What is the empirical formula for the bond that forms between Aluminum and Phosphorus? A. Al5P3 C. Al3P5 B. AlP D. Al3P3 6. Which of the following is the name given to the pairs of valence electrons that do not participate in bonding in covalent molecules? A. unvalenced pair D. bound pair B. outer pair E. inner pair C. lone pair 7. What is the total number of covalent bonds normally associated with a single carbon atom in a compound? A. 8 D. 2 B. 4 E. 1 C. 3 8. What is the compound N3Cl9 called: A. Trinitrogen Nonachlorine C. Trinitrogen Nonachloride B. Nitrogen Octochloride D. Nitrogen Chloride 9. A molecule with a triple covalent bond is _______. A. F2 C. N2 B. H2 D. O2 10. Which would be the best conductor of electricity and is more likely to have a crystalline structure? A. Cl2 D. NH3 B. H2O E. NaCl C. CH4 11. The sulfate ion is written in which of the following ways? A. S-2 D. SO4-2 B. HSO3-1 E. None of these C. SO3-2 12. In the compound Pt(OH)2, what is the charge on the platinum? A. +2 D. -3 B. -2 E. +4 C. +3 F. -4 13. In the Lewis structure for the OF2 molecule, the number of lone pairs of electrons around the central oxygen atom is… A. 0 D. 3 B. 1 E. 4 C. 2 14. Which of the following does not contain ionic bonds? A. Sulfur dioxide D. Silver oxide B. Sodium oxide E. A and C C. Silicon dioxide F. B and D 15. The picture below shows an apparatus that a teacher used for demonstrating the properties of ionic substances. The teacher heats a sample of sodium chloride that holds two electrodes connected to the circuit shown. The bulb does not light up. What is the best explanation for this? A. The circuit is not complete. B. Sodium chloride does not conduct electricity. C. The power pack wasn’t set up correctly. D. The teacher did not fully dissolve the sodium chloride in water, making it aqueous.