Answer :
Answer:
79 protons, 79 electrons and 118 neutrons
Explanation:
Hi, the atomic number of an element is equal to the number of protons it has.
For gold (Au): [tex]Protons_{Au}=79[/tex]
If the atom is uncharged (and only if it is uncharged), the number of electrons it has is equal to the number of protons.
For gold (Au): [tex]Electrons_{Au}=79[/tex]
At last, the atomic mass represents the protons plus the neutrons an atom has in its core. So:
[tex]Neutrons_{Au} + Protons_{Au}=197[/tex]
[tex]Neutrons_{Au}=197 - 79[/tex]
[tex]Neutrons_{Au}=118[/tex]
The atomic number is 79, therefore the atoms have 79 protons in their nuclei. Since the atom is uncharged, the number of protons equals the number of electrons: 79 electrons. The atomic mass is number of protons + neutrons. Since atomic mass is 197, 197-79= 118 neturons
