Questions: Use the periodic table to determine which compound below is covalently bonded. magnesium oxide (MgO) calcium iodide (Cal2) potassium chloride (KI) hydrogen chloride (HI)

Use the periodic table to determine which compound below is covalently bonded. magnesium oxide (MgO) calcium iodide (Cal2) potassium chloride (KI) hydrogen chloride (HI)
Transcript text: Use the periodic table to determine which compound below is covalently bonded. magnesium oxide $(\mathrm{MgO})$ calcium iodide $\left(\mathrm{Cal}_{2}\right)$ potassium chloride (KI) hydrogen chloride (HI)
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Solution

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Solution Steps

Step 1: Understanding Covalent Bonds

Covalent bonds are formed when two nonmetals share electrons. In contrast, ionic bonds are formed between metals and nonmetals, where electrons are transferred from one atom to another.

Step 2: Analyzing Each Compound
  • Magnesium oxide (MgO): Magnesium is a metal, and oxygen is a nonmetal. This compound is ionic.
  • Calcium iodide (CaI\(_2\)): Calcium is a metal, and iodine is a nonmetal. This compound is ionic.
  • Potassium chloride (KI): Potassium is a metal, and chlorine is a nonmetal. This compound is ionic.
  • Hydrogen chloride (HI): Both hydrogen and chlorine are nonmetals. This compound is covalent.

Final Answer

The compound that is covalently bonded is \(\boxed{\text{hydrogen chloride (HI)}}\).

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