Understanding Covalent Compounds

The video explains the properties of covalent compounds, focusing on the structure of covalent molecules like water. It distinguishes between strong intramolecular bonds and weak intermolecular bonds, such as hydrogen bonds. These weak bonds result in low melting and boiling points for covalent compounds, which often exist as liquids or gases. Covalent compounds do not conduct electricity due to the lack of free-moving charges. Solubility varies, with polar molecules dissolving in water, unlike nonpolar molecules.

What type of bond is formed within a water molecule?

• Ionic bond

• Hydrogen bond

• Metallic bond

• Covalent bond

Which type of bond is considered strong and difficult to break?

• Intramolecular bond

• Intermolecular bond

• Dispersion force

• Hydrogen bond

Why do covalent compounds generally have low melting and boiling points?

• Because they are ionic

• Because of weak intermolecular forces

• Due to strong covalent bonds

• Due to metallic bonding

What happens to the intermolecular bonds when you put your hand into a jar of water?

• They break and reform

• They turn into covalent bonds

• They become stronger

• They conduct electricity

Why do most covalent molecules exist as liquids and gases?

• Because they are ionic

• Because they are metallic

• Due to strong intermolecular forces

• Due to weak intermolecular forces

Why do covalent compounds not conduct electricity?

• They have charged particles

• They have free-moving electrons

• They are metallic

• They lack free-moving charges

In carbon tetrachloride, how are the electrons shared?

• They are shared between atoms

• They are ionic

• They are free to move

• They are not shared

What type of molecules dissolve easily in water?

• Metallic molecules

• Polar molecules

• Nonpolar molecules

• Ionic molecules

Why do nonpolar molecules not dissolve in water?

• They lack a dipole

• They have a positive and negative end

• They have polar bonds

• They are ionic

What is an example of a polar molecule that dissolves in water?

• Methane

• Oxygen

• Ethanol

• Carbon dioxide