Which of the following pairs of elements are likely to form...

Which of the following pairs of elements are likely to form an ionic compound?
a. lithium and chlorine
b. oxygen and bromine
c. potassium and oxygen
d. sodium and neon
e. cesium and magnesium
f. nitrogen and fluorine

Key Concepts

Periodic Trends

Periodic trends such as atomic size, ionization energy, and electron affinity provide important insights into how elements interact. These trends help explain why elements from different regions of the periodic table, such as metals and nonmetals, are predisposed to forming ionic compounds through the transfer of electrons.

Electronegativity Difference

Electronegativity refers to the ability of an atom to attract electrons in a bond. A significant difference in electronegativity between two atoms often leads to the complete transfer of electrons, resulting in the formation of ionic bonds. This concept is essential for predicting which pairs of elements are likely to form ionic compounds.

Ionic Bonding

Ionic bonding is the chemical process where electrons are transferred from one atom to another, resulting in the formation of oppositely charged ions that attract each other. This type of bonding typically occurs between elements with significantly different electronegativities, leading to the creation of a stable compound through electrostatic interactions.

Metal and Nonmetal Character

The formation of ionic compounds generally involves a metal and a nonmetal. Metals, which are found on the left side of the periodic table, have low ionization energies and tend to lose electrons, forming positively charged ions. Nonmetals, on the right side of the periodic table, have higher electron affinities and tend to gain electrons, forming negatively charged ions. This contrast in electron behavior is key to ionic bond formation.

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