A.) Rearrange and form new substances with new properties
Explanation:
According to Dalton's atomic theory, atoms are the smallest parts of elements. In chemical reactions atoms will re-arrange and form new substances with new properties.
The holy grail of the Dalton's atomic theory is the indestructible nature of atoms.
Atoms were considered to be the smallest and the thinnest particles of any substances.
In chemical reactions, atoms only recombine.
Atoms are not broken down into any simpler substances.
Atoms cannot be created nor are they destroyed. They only recombine to form new compounds.
They cannot be turned completely to energy according to Dalton's theory. But nuclear reactions nowadays refutes that.