1. Decrease the Number of Protons:
* Mercury (Hg) has 80 protons. To become gold (Au), which has 79 protons, one proton must be removed.
* This would change the atomic number and make the atom a gold atom.
2. Decrease the Number of Neutrons:
* Mercury-202 has 122 neutrons (202 - 80 = 122). Gold-197 has 118 neutrons (197 - 79 = 118).
* To make the change, four neutrons must be removed.
Important Note:
* Changing the number of protons fundamentally changes the element. This process is called nuclear transmutation.
* It's not something that happens easily or naturally. Nuclear transmutation usually requires high-energy particle accelerators or nuclear reactors to induce changes in atomic nuclei.
In summary, to transform ²⁰²Hg into ¹⁹⁷Au, you would need to:
* Reduce the number of protons by one.
* Reduce the number of neutrons by four.
