What does a nuclear change involve? melting or freezing mixing different compounds together interactions with electrons a change in the structure of the nucleus?

A change in the structure of the nucleus

Explanation:

A nuclear change is a change that occurs in the nucleus of an atom and this changes includes :

a nuclear change is different from a chemical in the sense that in a chemical new elements are formed and the core of the atoms which is the nucleus of the atoms that make up the element are not affected. while a nuclear change affects the nucleus of the atoms directly.  example of a chemical change is the mixing of different compounds together .

the federalist party which advocated strong centralization dominated the united states government till 1800. so 1800 election transformed the power from one party to another party for the first time and was thus a turning point in american history. so jefferson called it "revolution of 1800".

explanation:

newly independent countries of the former ussr