Mufeiple Choice Use the scantron provide to answer these questions 2pts each 1-6

Question

Mufeiple Choice Use the scantron provide to answer these questions 2pts each 1-6: Match each of the following descriptions with the type bond. a. Metailie bond b Covalent bond c. Polar covalent bond d. lonie bond e. Hydrogen Bond 1. An uneven sharing of electrons 2. A mutual attraction for a delocalized sea of electrons. 3. An intermolecular force that occurs in water. 4. An electrostatic attraction that occurs after the transfer of an electron. 5. A mutual attractlon for a pair of electrons between two atoms 6, Cr(NO)2 is called A) Chromium II nitrite B) Chromium IlI nitrate C) Chromlum II nitrate D) Chromiurn II nitride 7. Chemist consider dot formulas representing the atom with its valence electrons important because Every atom has its own symbol. It is valence electrons that are involved in bonding. a. b. c. The number of dots represents the number of protons d. The valence electrons are always the highest energy electrons. 8. Which of the following molecules exhibits covalent and ionic bonding? b. PCls C. NaCI d. H202 e. KNOs 9. The electron-dot structure (Lewis structure) for which of the following molecules would have no unshared pairs of electrons on the central atom? a CO2 b. PCl d. SF e. SO2

Explanation / Answer

Q1

metallic bond --> mutual attraction in decolized sea of electrons

covalent bond --> mutual attraction due to electron pairs

polar covalent --> 1, uneven shar of electrons

ionic bonding --> 4, electrostatic attraction

Hbonding --> intermolecular force in water

Q6

Cr = +2 and No3- = nitrate

so

Chromium (II) nitrate

Q7

a, correct, but has nothing to do with this

b is true, valence electrons are involved in bonding

c is false

d is false

Q8

covalent --> must have nonmetal

ionic --> must have metal

therefore

only KNO3 is true

Q9

CO2 --> has no electrons left due to O=C=O

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