The 79 is most likely an atomic number - which would be gold (Au) in this case. It is also the number of protons in one atom of gold.
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The number 79 in the Periodic Table refers to the atomic number of the element gold. This number represents the number of protons found in the nucleus of a gold atom.
The atomic number is 79.
Gold has the atomic number 79; group 11, period 6.
Ci means chlorine in the periodic table
The table of elements is called the Periodic Table of Elements. It organizes all known chemical elements based on their atomic number and chemical properties.
The periodic table of elements was invented by the Russian chemist Dmitri Mendeleev and nowadays it's the most common way to tabulate the elements.