Chemistry Final S1

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting substances in a chemical reaction that undergo change to form products.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the composition is uniform throughout, such as a solution of solids in a solvent.

Front

What does the Heisenberg uncertainty principle state?

Back

The Heisenberg uncertainty principle states that it is impossible to simultaneously know both the exact position and exact momentum of a particle.

Front

What does a high frequency (e.g., 2.88 × 10^21 Hz) indicate about electromagnetic radiation?

Back

A high frequency indicates that the electromagnetic radiation is high-energy, such as gamma rays.

Front

What is the primary function of chlorophyll in plants?

Back

The primary function of chlorophyll in plants is to absorb light energy for photosynthesis.

Front

What are products in a chemical reaction?

Back

Products are the substances that are formed as a result of a chemical reaction.

Front

Define a colloidal suspension.

Back

A colloidal suspension is a heterogeneous mixture where solid particles are dispersed in a liquid but do not settle out.

Front

What is the difference between physical changes and chemical changes?

Back

Physical changes affect the form of a substance but not its chemical composition, while chemical changes result in the formation of new substances.

Front

What is the significance of the atomic number?

Back

The atomic number represents the number of protons in the nucleus of an atom and determines the element's identity.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.