The atom of an element has $20$ protons, $20$ neutrons, and $20$ electrons. Find out its atomic number.

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Solution

Given:
Number of protons $= 20$
Number of neutrons $= 20$
Number of electrons $= 20$
Formula used:
Atomic number $=$ Number of protons $=$ Number of electrons
Calculate the atomic number:
Atomic number $=$ Number of protons $=$ Number of electrons
Atomic number $= 20$
Thus, the atomic number of the element is $20$ .

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