Multiple Choice
The element sulfur (S) is most likely to form covalent bonds with which of the following elements?
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11. Bonding & Molecular Structure
Chemical Bonds
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Classify the following compounds as having covalent or ionic bonds: NaCl, H2O, CO2, and MgO.
A
NaCl and CO2 are ionic; H2O and MgO are covalent.
B
NaCl and MgO are ionic; H2O and CO2 are covalent.
C
NaCl and H2O are covalent; CO2 and MgO are ionic.
D
All four compounds are covalent.
Verified step by step guidance1
Step 1: Understand the difference between ionic and covalent bonds. Ionic bonds form between metals and nonmetals through the transfer of electrons, while covalent bonds form between nonmetals by sharing electrons.
Step 2: Identify the elements in each compound and determine if they are metals or nonmetals. For example, Na (sodium) and Mg (magnesium) are metals, while Cl (chlorine), O (oxygen), and C (carbon) are nonmetals.
Step 3: Classify each compound based on the types of elements involved. NaCl consists of a metal (Na) and a nonmetal (Cl), so it is ionic. MgO consists of a metal (Mg) and a nonmetal (O), so it is ionic as well.
Step 4: For H2O and CO2, both contain only nonmetals (H, O, and C), so these compounds form covalent bonds by sharing electrons.
Step 5: Summarize the classification: NaCl and MgO are ionic compounds, while H2O and CO2 are covalent compounds.
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