Front

What is a solid?

Back

A state of matter characterized by fixed shape and volume, where particles are closely packed together.

Front

What is an exothermic reaction?

Back

A chemical reaction that releases heat, causing the surroundings to feel warm.

Front

What is an endothermic reaction?

Back

A chemical reaction that absorbs heat, causing the surroundings to feel cold.

Front

What is a solution?

Back

A homogeneous mixture formed when a solute (like sugar) is dissolved in a solvent (like water).

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded and can be separated by physical means.

Front

What is an atom?

Back

The basic unit of a chemical element, consisting of a nucleus surrounded by electrons.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a molecule?

Back

A group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is the difference between a compound and a mixture?

Back

A compound is a chemical combination of elements, while a mixture is a physical combination of substances.