Examples of High and Low Electronegativity Elements

🧪 Quick Study Guide

• ⚛️ Electronegativity is the measure of an atom's ability to attract electrons in a chemical bond.
• 📈 Electronegativity generally increases across a period (left to right) and decreases down a group (top to bottom) in the periodic table.
• 🥇 Fluorine (F) is the most electronegative element.
• 🥈 Cesium (Cs) and Francium (Fr) are among the least electronegative elements.
• ⚖️ Pauling scale is commonly used to quantify electronegativity, ranging from about 0.7 to 4.0.
• 🔗 The greater the difference in electronegativity between two atoms, the more polar the bond.
• 💧 Nonpolar covalent bonds occur when electronegativity difference is small (typically less than 0.4).

Practice Quiz

1. Which of the following elements has the highest electronegativity?
1. A. Cesium (Cs)
2. B. Fluorine (F)
3. C. Sodium (Na)
4. D. Lithium (Li)
2. Which element is known to have a very low electronegativity?
1. A. Oxygen (O)
2. B. Chlorine (Cl)
3. C. Cesium (Cs)
4. D. Nitrogen (N)
3. Electronegativity generally _________ across a period in the periodic table.
1. A. Decreases
2. B. Increases
3. C. Remains constant
4. D. Fluctuates randomly
4. Which of these bonds would be considered the MOST polar?
1. A. C-H
2. B. H-H
3. C. Na-Cl
4. D. O-H
5. Which of the following elements is LEAST likely to attract electrons in a chemical bond?
1. A. Fluorine
2. B. Oxygen
3. C. Lithium
4. D. Chlorine
6. What is the approximate electronegativity value of Cesium (Cs) on the Pauling scale?
1. A. 4.0
2. B. 3.0
3. C. 0.7
4. D. 2.5
7. Which of the following best describes a bond between two atoms with very similar electronegativity values?
1. A. Polar covalent
2. B. Ionic
3. C. Nonpolar covalent
4. D. Metallic