Calculate the fraction of bonding of MgO that is ionic. |...

Name: Problem 14, Chapter 2: The Science and Engineering of Materials
Uploaded: 2021-11-10T09:09:25-08:00
Duration: 4 min 30 s
Channel: Mirza Aslam Beig
Description: Calculate the fraction of bonding of MgO that is ionic.

Key Concepts

Ionic Bonding

Ionic bonding is a type of chemical bond formed through the electrostatic attraction between oppositely charged ions. In ionic compounds, one atom donates one or more electrons to another, resulting in the formation of cations and anions. This type of bonding is typically observed in compounds formed between metals and non-metals, where the metal loses electrons and the non-metal gains electrons, leading to a strong lattice energy that holds the ions together.

Covalent Bonding and Bond Polarity

While ionic bonds involve electron transfer, many bonds have a mixture of ionic and covalent characteristics due to unequal sharing of electrons. This sharing leads to polar covalent bonds where the electron density is skewed towards the more electronegative atom. Understanding the degree of covalent versus ionic character in a bond allows for a more nuanced view of chemical bonding, as most real-world bonds are not purely ionic or purely covalent.

Electronegativity Difference

Electronegativity is the measure of an atom's ability to attract electrons in a bond. The difference in electronegativity between two bonded atoms is a key factor in determining the bond’s character. A large difference typically results in more ionic character since the electron is more likely to transfer rather than be shared equally. This concept is used to predict and quantify the ionic versus covalent nature of bonds.

Fraction of Ionic Character

The fraction of ionic character quantifies the extent to which a chemical bond exhibits ionic behavior as opposed to covalent behavior. This fraction is often derived from empirical formulas that relate the electronegativity difference to the proportion of ionic bonding within a molecule. In substances like MgO, calculating the fraction of ionic character helps in understanding the extent to which the bond is dominated by electrostatic interactions due to electron transfer between the magnesium and oxygen atoms.

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