Chemistry test

Matter

Anything that has mass and takes up space.

Pure Substances

Matter that contains only one kind of particle, which can be a single type of atom or compound.

Elements

A pure substance that cannot be broken down into simpler parts by chemical methods, consisting of different types of atoms.

Compounds

A pure substance made of two or more different elements that are chemically combined.

Mixtures

Matter that contains more than one kind of particle.

Mechanical Mixtures

Mixtures in which two or more substances are combined and can be visually distinguished.

Solutions

A mixture made up of more than one substance, appearing as only one substance; involves a solute and a solvent.

Physical Properties

Characteristics of a substance that can be observed and measured without changing its chemical identity.

Qualitative Physical Properties

Properties that can be observed and described without measurement, such as state, opacity, and malleability.

Quantitative Physical Properties

Properties that involve measurement and numerical values, such as melting point and boiling point.

Chemical Properties

The ability of a substance to react with other substances to form new substances.

Reactivity

A chemical property that describes how a substance reacts with water, oxygen, or acids.

Combustibility

The ability of a substance to burn in air.

Stability

How easily a substance decomposes or breaks down.

Toxicity

The ability of a substance to cause harm to animals or plants.

Physical Changes

Changes in matter that do not produce new substances.

Chemical Changes

Reactions that result in the formation of one or more new substances.