Atomic Structure and Bonding Review

Iodine, I (atomic number 53), is an essential element for human life. The model illustrates an iodine-127 atom, with 53 protons, 74 neutrons, and 53 electrons.

Which of the following would be the outcome of this essential element if one proton is added to this iodine nucleus?

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Magnesium reacts with another element to form a compound.

Which element MOST LIKELY combined with the magnesium?

• Sodium

• Argon

• Sulfur

• Calcium

Which of the following compounds are covalent?

• Sodium hydride (NaH)

• Carbon tetrachloride (CCl₄)

• Magnesium chloride (MgCl₂)

• Magnesium chloride (NaOH)

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Which ionic compound is BOTH correctly written and named?

• MgO – magnesium oxide

• MnO₂ - manganese oxide

• NO₂ - nitrogen oxide

• SrBr - strontium bromide

A. Phosphorus trifluoride

B. Boron trichloride

C. Chlorine pentafluoride

Which includes the correct formulas for these compounds?

• A. F₃P

  B. Cl₃B

  C. F₅Cl

• A. PCl₃

  B. BrCl₃

  C. CF₅

• A. PF₃

  B. BCl₃

  C. ClF₅

• A. PhFl₃

  B. BoCh₃

  C. ChFl₅

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In Deanna’s community, calcium fluoride occurs naturally in its drinking water. She drew several models of this compound using these spheres:

Which of Deanna’s models correctly represents a stable calcium fluoride compound?

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Which of the following formula and chemical name combinations is correctly shown?

• N₂O₂; nitrogen dioxide

• N₂O₅; dinitrogen pentoxide

• Ca₂P₃; dicalcium diphosphide

• PCl₅; phosphorus tetrachloride

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a. IF₇

b. PO₅

c. NO₅

Which shows the correct names for these compounds?

• a. iodide heptafluorine

  b. diphosphorus pentaoxide

  c. dinitride pentaoxygen

• a. iodine heptafluoride

  b. pentaphosphorus dioxide

  c. pentanitrogen dioxide

• a. iodine heptafluoride

  b. diphosphorus pentaoxide

  c. dinitrogen pentaoxide

• a. heptaiodide fluorine

  b. diphosphorus pentaoxide

  c. pentanitride dioxygen

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Which choice represents a correctly written formula for sulfur hexafluoride?

• SF

• SF₂

• SF₆

• S₆F

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Which of the following represents a correctly written binary ionic compound for the atoms shown?

• Mg₂P₃

• Mg₃P₂

• P₂Mg₃

• P₃Mg₂

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