Examples of Molecules with Single Covalent Bonds

📚 Quick Study Guide

• ⚛️ A covalent bond is formed by the sharing of electrons between atoms.
• 🔗 A single covalent bond involves the sharing of one pair of electrons.
• 💧 Simple molecules like hydrogen ($H_2$), chlorine ($Cl_2$), methane ($CH_4$), and water ($H_2O$) exhibit single covalent bonds.
• 💡 The number of single bonds an atom can form is often related to its valence electrons (e.g., carbon with 4 valence electrons can form 4 single bonds).
• 📏 Bond length and bond energy are important properties of single covalent bonds; shorter bond lengths generally indicate stronger bonds.

🧪 Practice Quiz

1. Which of the following molecules contains ONLY single covalent bonds?

   1. $O_2$
   2. $N_2$
   3. $CH_4$
   4. $CO_2$

2. In a single covalent bond, how many electrons are shared between two atoms?

   1. 1
   2. 2
   3. 3
   4. 4

3. Which element is commonly found forming multiple single covalent bonds to achieve a stable octet?

   1. Hydrogen
   2. Helium
   3. Carbon
   4. Sodium

4. Which of these molecules has a bent molecular geometry due to the presence of single covalent bonds and lone pairs on the central atom?

   1. $CO_2$
   2. $CH_4$
   3. $H_2O$
   4. $BeCl_2$

5. What is the approximate bond angle in methane ($CH_4$), a molecule with four single covalent bonds?

   1. 90 degrees
   2. 109.5 degrees
   3. 120 degrees
   4. 180 degrees

6. Which of the following statements is TRUE about single covalent bonds?

   1. They are weaker than ionic bonds.
   2. They involve the transfer of electrons.
   3. They only occur between metals.
   4. They are always nonpolar.

7. Which molecule features a central atom with three single bonds and one lone pair of electrons?

   1. $NH_3$
   2. $CH_4$
   3. $H_2O$
   4. $CO_2$