Question

which of the following happens during a chemical change? check all of the boxes that apply. one atom or more changes into atoms of another element. new substances with different properties are formed. solids, liquids, or gases may form. reaction mixtures always give off some heat. reaction mixtures always need to be heated.

Explanation:

In a chemical change, new substances with different properties are formed. Also, solids, liquids, or gases can be produced as a result of the reaction. One - atom changing into another atom occurs in nuclear reactions, not in normal chemical changes. Reaction mixtures can be exothermic (give off heat) or endothermic (absorb heat), and not all reactions require heating to start.

Answer:

New substances with different properties are formed.
Solids, liquids, or gases may form.