Question

what is the atomic number of this element

Answer 1

The atomic number or proton number(symbol Z) of a chemical element is the number of protons found in the nucleus of an atom. It is identical to the charge number of the nucleus. The Atomic number uniquely identifies a chemical element. In an uncharged atom, the atomic number is also equal to the number of electrons.

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Answer 2

which element ? You did not mention . okay ask me in comments .I will answer.