Interactive Molecule Quiz: Test Your Knowledge

📚 Quick Study Guide

• ⚛️ A molecule is a group of two or more atoms held together by chemical bonds.
• 🤝 Covalent bonds involve the sharing of electrons between atoms.
• ➕ Ionic bonds involve the transfer of electrons between atoms, creating ions.
• 💧 Polar molecules have an uneven distribution of electron density, leading to partial charges.
• 🌐 Nonpolar molecules have an even distribution of electron density.
• ⚖️ Molecular weight is the sum of the atomic weights of all atoms in a molecule.
• 🌡️ Intermolecular forces (e.g., hydrogen bonding, van der Waals forces) affect a substance's physical properties like boiling point.

🧪 Practice Quiz

1. Question 1: Which of the following molecules is nonpolar?
   1. $H_2O$
   2. $NH_3$
   3. $CO_2$
   4. $SO_2$
2. Question 2: What type of bond is formed when electrons are shared between two atoms?
   1. Ionic bond
   2. Covalent bond
   3. Hydrogen bond
   4. Metallic bond
3. Question 3: Which of the following is an example of an ionic compound?
   1. $CH_4$
   2. $NaCl$
   3. $O_2$
   4. $H_2O$
4. Question 4: Which intermolecular force is primarily responsible for the high boiling point of water?
   1. Van der Waals forces
   2. Dipole-dipole interactions
   3. Hydrogen bonding
   4. Ionic interactions
5. Question 5: What is the molecular weight of methane ($CH_4$)? (Atomic weights: C = 12, H = 1)
   1. 14 g/mol
   2. 15 g/mol
   3. 16 g/mol
   4. 17 g/mol
6. Question 6: Which of the following molecules is polar?
   1. $CCl_4$
   2. $BF_3$
   3. $H_2S$
   4. $CO_2$
7. Question 7: What is the shape of a water molecule ($H_2O$)?
   1. Linear
   2. Trigonal planar
   3. Tetrahedral
   4. Bent