We appreciate your visit to An uncharged atom of gold has an atomic number of 79 and an atomic mass of 197 This atom has protons neutrons and electrons A. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!
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]
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Rewritten by : Barada
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
