Question

A change in the nucleus of an atom that converts the atom from one element to another element is called

Answer 1

Answer: Transmutation

Explanation: Combustion, polymerization and neutralization are reactions that depends on electron exchange and molecular bonds rearrange. However, change the nucleus implies change the number of protons which requieres a lot of energy and also change the identity of the element.

Elements are defined by the number of protons in the nucleus, because this is a heavy particle compare to electron and the interaction between them gives special properties.

Breaking nucleus of an atom to transform into other is the principle of nuclear reactions, and the process that take place is transmutation.

Answer 2

Combustion is the term used when something ignites
Neutralization is the term used when opposite pH acids and alkalis mix
Polymerization is the term used when monomers are chemically reacted to make polymers
Transmutation is the term used when an atom changes from one element to another