Oxygen

Carbon

Nitrogen

Water

Based on size and weight

Based on chemical composition as elements or compounds, and based on physical properties as elements, compounds, or alloys.

Based on taste and smell

Based on color and texture

Homogeneous mixtures are always solid, while heterogeneous mixtures are always liquid.

Homogeneous mixtures are always transparent, while heterogeneous mixtures are always opaque.

Homogeneous mixtures have non-uniform composition, while heterogeneous mixtures have uniform composition.

Homogeneous mixtures have uniform composition, while heterogeneous mixtures have non-uniform composition.

Chemical properties of matter refer to the temperature at which a substance boils.

Chemical properties of matter are related to the weight of a substance.

Chemical properties of matter describe the physical appearance of a substance.

Chemical properties of matter describe how a substance interacts with other substances to form new substances.

Ionic compounds, Covalent compounds

Molecular compounds

Organic compounds

Metallic compounds

Pure substances are classified into solids and liquids.

Pure substances are classified into metals and non-metals.

Pure substances are classified into elements and compounds.

Pure substances are classified into organic and inorganic.

Sand and water mixture

Sugar water solution

Oil and water mixture

Salt water solution

Chemical properties of matter describe how substances interact with other substances to form new substances.

Chemical properties of matter are constant and do not change.

Chemical properties of matter are related to physical properties only.

Chemical properties of matter do not involve interactions with other substances.

High melting and boiling points, conduct electricity when molten or in solution, crystalline solid at room temperature

Low melting and boiling points, insulator in all states, liquid at room temperature

Low melting and boiling points, conduct electricity in solid state, amorphous structure

High melting and boiling points, non-crystalline structure, gas at room temperature

By listening to the material

By tasting the material

By analyzing the physical properties and composition of the material.

By smelling the material

Matter is composed of molecules, which are made up of subatomic particles like protons, neutrons, and electrons.

Matter is composed of dark matter particles that are not detectable.

Matter is composed of energy waves that interact with each other.

Matter is composed of atoms, which are made up of subatomic particles like protons, neutrons, and electrons.

Good electrical conductivity in pure form

Always solid at room temperature

High melting and boiling points

Properties of a covalent compound include low melting and boiling points, typically gases or liquids at room temperature, and lack of electrical conductivity in pure form.

A compound is a homogeneous mixture, while a mixture is a heterogeneous mixture.

A compound is a substance with fixed composition, while a mixture is a combination of substances with variable composition.

A compound is a mixture of substances, while a mixture is a single substance.

A compound is always a liquid, while a mixture can be in any state of matter.

Homogeneous mixtures have non-uniform composition, while heterogeneous mixtures have uniform composition.

Homogeneous mixtures have visible boundaries, while heterogeneous mixtures do not.

Homogeneous mixtures have uniform composition, while heterogeneous mixtures have non-uniform composition.

Homogeneous mixtures are always solid, while heterogeneous mixtures are always liquid.

An element

A molecule

A compound

A mixture of elements and compounds

metal with nonmetal

nonmetal with nonmetal

metal with nonmetal

nonmetal with nonmetal

a. Slower and closer together

b. Slower and farther apart

c. Faster and farther apart

d. Faster and closer together

Mass is constant, weight varies

Mass varies, weight is constant

Mass and weight are both constant

Mass and weight varies.