Compounds & Mixtures Review

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. For example, water (H₂O) is a compound made of hydrogen and oxygen.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. Each substance retains its own properties. For example, a salad is a mixture of different vegetables.

Front

What is the difference between a homogeneous mixture and a heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout, while a heterogeneous mixture has a non-uniform composition. Example: Salt water is homogeneous; a salad is heterogeneous.

Front

What is the chemical formula for magnesium chloride?

Back

MgCl₂

Front

What type of bond involves the delocalization of electrons in a 'sea'?

Back

Metallic bond.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include oxygen (O) and gold (Au).

Front

What is a solution?

Back

A solution is a homogeneous mixture where one substance (solute) is dissolved in another (solvent). For example, sugar dissolved in water.

Front

What is an ionic bond?

Back

An ionic bond is a type of chemical bond formed through the electrostatic attraction between oppositely charged ions. Example: Sodium chloride (NaCl).

Front

What is a covalent bond?

Back

A covalent bond is a chemical bond formed when two atoms share one or more pairs of electrons. Example: The bond in a water molecule (H₂O).

Front

What is a polar covalent bond?

Back

A polar covalent bond is a type of covalent bond where the electrons are shared unequally between the two atoms, resulting in a molecule with a slight charge. Example: Water (H₂O).