Question

which type of change does the statement describe?
particles rearrange into new combinations, forming new substances.
there is no change in the chemical properties of the substance.
particles retain their composition and identity.
the chemical properties of the substance change.

physical change	chemical change

Explanation:

To determine which change (physical or chemical) each statement describes, we use the definitions of physical and chemical changes:

• Physical Change: Involves a change in physical state or appearance, but the substance’s chemical identity (and properties) remains the same. Particles retain their composition/identity, and chemical properties do not change.
• Chemical Change: Involves the formation of new substances with different chemical properties. Particles rearrange into new combinations (forming new substances), and chemical properties change.

Physical Change Statements:

• "There is no change in the chemical properties of the substance." (No change in chemical identity → physical change.)
• "Particles retain their composition and identity." (Substance’s identity remains → physical change.)

Chemical Change Statements:

• "Particles rearrange into new combinations, forming new substances." (New substances form → chemical change.)
• "The chemical properties of the substance change." (Chemical identity changes → chemical change.)

Answer:

Physical Change	Chemical Change