The official web site of the Nobel Prize explains that Marie Curie’s chemistry prize was partly for her discovery that the radioactivity of a substance is unaffected when it undergoes a chemical reaction. What does this discovery imply?
Radioactivity involves all particles that make up an atom.
Radioactivity involves the particles that make up an atom’s nucleus.
Radioactivity involves only neutrons.
Radioactivity involves only the electrons in an atom’s electron cloud.

The official web site of the Nobel Prize explains that Marie Curie’s chemistry prize was partly for her discovery that the radioactivity of a substance is unaffected when it undergoes a chemical reaction. The discovery implied was that, Radioactivity involves Radioactivity involves only neutrons.

Explanation:

The official web site of the Nobel Prize explains that Marie Curie’s chemistry prize was partly for her discovery that the radioactivity of a substance is unaffected when it undergoes a chemical reaction. The discovery implied was that, Radioactivity involves only neutrons.Marie Curie studied about the radiation of all compounds containing the known radioactive elements, including uranium and thorium, which she later discovered that they were radioactive.she discovered the following results,the exact measurement of the strength of the radiation from uranium;the intensity of the radiation was found to be proportional to the amount of uranium or thorium in the compound .the ability to emit radiation is not dependent on the arrangement of the atoms in a molecule; it must be linked to the interior of the atom itself which is a revolutionary discovery.

The answer is frictional force

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