The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number, oganesson. The atomic number of an element is the number of protons in the nucleus of an atom of that element.
118
Each of the 118 known elements has its own chemical symbol — one or two letters that proudly represent the element's name from its box on the periodic table.
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Answer:
Atomic number
The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number, oganesson. The atomic number of an element is the number of protons in the nucleus of an atom of that element.
118
Each of the 118 known elements has its own chemical symbol — one or two letters that proudly represent the element's name from its box on the periodic table.