Understanding Matter and Bonding

Which of the following is a homogeneous mixture?

• Saltwater

• Oil

• Sand

• Air

Which isotope of carbon is used in radiocarbon dating?

• carbon-13

• carbon-12

• carbon-15

• carbon-14

Which technique is best for separating a mixture of liquids based on boiling points?

• Chromatography

• Centrifugation

• Filtration

• Distillation

Which method is commonly used to identify elements in a compound?

• Distillation

• Filtration

• Spectroscopy

• Chemical analysis

Which of the following is a pure substance?

• Saltwater

• Distilled water

• Air

• Sugar solution

Which intermolecular force is the strongest?

• Hydrogen bonding

• Ionic bonds

• Dipole-dipole interactions

• Van der Waals forces

What is the smallest unit of an element that retains its properties?

• atom

• molecule

• ion

• compound

Which type of bond involves the sharing of electron pairs between atoms?

• Hydrogen bond

• Covalent bond

• Metallic bond

• Ionic bond

What is the primary force that holds atoms together in a molecule?

• Covalent bonds

• Hydrogen bonds

• Van der Waals forces

• Ionic bonds

Which of the following describes an ionic bond?

• An ionic bond is a type of covalent bond between two nonmetals.

• An ionic bond involves the sharing of electrons between atoms.

• An ionic bond is the electrostatic attraction between oppositely charged ions.

• An ionic bond is formed when two atoms have the same charge.