The atomic number of the atom shown in the given figure is 18. Hence, The correct answer is Option (C).
What is Atomic Number ?
Atomic number is the number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table.
The number of proton is equal to number of electron in a neutral atom.
Thus, As the given figure has 18 electrons in it which means it has 18 protons as well. Hence the atomic Number is 18.
Therefore, The atomic number of the atom shown in the given figure is 18. Hence, The correct answer is Option (C).
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