Question

In atomic theory, new substances are formed when the atoms of other substances are rearranged. In this kind of change, the total number of atoms is conserved.

An example of this is shown in the diagram below. There are six atoms both before and after the arrow.
Which statement below is also true of the rearrangement of atoms?

Answer 1

In a chemical change, new substances are formed through the rearrangement of atoms, while the total number of atoms remains constant.

Step-by-step explanation:

When atoms of substances are rearranged in a chemical change, new substances are formed. This rearrangement involves the breaking and forming of chemical bonds, resulting in different chemical compositions. However, the total number of atoms remains the same before and after the change, adhering to the law of conservation of mass. For example, if six atoms of a substance are present before a chemical reaction, there will still be six atoms after the reaction.