Problem: Which of the following best describes a pair of elements that will form an ionic bond?A. C and H: Hydrogen easily loses electrons, and carbon gains them.B. Li and O: Oxygen easily loses electrons, and lithium gains them.C. P and Cl: Phosphorus easily loses electrons, and chlorine gains them.D. Ca and Br: Calcium easily loses electrons, and bromine gains them.

FREE Expert Solution

We’re being asked to identify which best describes a pair of elements that will form an ionic bond. Let’s first define a covalent bond and an ionic bond.


Covalent or Molecular Compound

▪ composed of more than one nonmetal together
▪ nonmetal + nonmetal = covalent bond

Ionic Compound

▪ composed of a positive ion called a cation connected to a negative ion called an anion.
positive ions (cations) are usually metals and negative ions (anion) are usually nonmetals

metal + nonmetal = ionic bond

▪ cations and anions can also be polyatomic ions (example: NH4+, C­H3COO-, SO42-)

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Problem Details

Which of the following best describes a pair of elements that will form an ionic bond?

A. C and H: Hydrogen easily loses electrons, and carbon gains them.

B. Li and O: Oxygen easily loses electrons, and lithium gains them.

C. P and Cl: Phosphorus easily loses electrons, and chlorine gains them.

D. Ca and Br: Calcium easily loses electrons, and bromine gains them.

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