Checkpoint 3 Review of Chemical Bonding and Electron Arrangement

Why does the element Fluorine (F) readily form compounds?

• A. Fluorine (F) has one valence electron which can easily lose one.

• B. Group 7 elements are the least reactive and form compounds easily.

• C. Losing one electron creates a stable electron arrangement.

• D. Gaining one electron creates a stable electron arrangement.

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Table salt, NaCl, is a common ionic compound. Sodium and chlorine are found in this form together primarily because —

• sodium is missing 1 valence electron needed to form a complete, stable octet shell

• chlorine has 1 one valence electron it can give away in order to form a complete, stable octet shell

• sodium has 1 one valence electron it can give away in order to form a complete, stable octet shell

• chlorine can accept 2 – 3 additional electrons per atom to form a stable octet shell

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Fill in the blank: The central atom in the electron dot structure of PCl₃ is ______.

• A. Chlorine

• B. Phosphorus

• C. Oxygen

• D. Nitrogen

What is the shape of a CO₂ molecule?

• linear

• tetrahedral

• trigonal planar

• bent

Which of the following is a correct Lewis Dot diagram for a covalent bond?

• A.

• B.

• C.

• D.

Which of the following pairs correctly matches a compound with its correct molecular geometry? Select TWO correct answers.

• A. Boron Trifluoride (BF₃): trigonal planar

• B. water (H₂O): trigonal planar

• C. carbon dioxide (CO₂): tetrahedral

• D. Sulfur Trioxide (SO₃): trigonal planar

• E. carbon tetrachloride (CCl₄): trigonal pyramidal

Which of the following diagrams correctly represents the formation of a compound consisting of magnesium fluoride, MgF₂? (Select ONE answer)

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Which type of chemical bond is formed by the electrostatic force between a positive ion and a negative ion?

• Cooperative

• Covalent

• Ionic

• Metallic

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The diagram shown below most likely depicts the arrangement of atoms in a –

• diamond

• salt

• metal

• gas

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What are some characteristics of ionic and covalent bonds?

• Ionic bond: bonding through transferred electrons and covalent through shared electrons

• Covalent bond: bonding through transferred electrons and ionic through shared electrons

• Ionic bond: metal bonds to other metal bonds

• Covalent bond: metal bonds to nonmetal

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