In the future you synthesizes a new element. A neutral atom of the element, say 'X', has 4 electrons and 2 neutrons. How will you represent the nucleus of the element in your award winning paper?

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Solution

The correct option is B

The atomic number, Z, is equal to number of protons, which is equal to number of electrons, as the atom is neutral. So, Z= 4.

Also, the mass number, A, is given as N+Z, where N is the number of neutrons. So, A=N+Z=2+4=6. And, nucleus is represented as $_{Z}^{A} X$ so, this nucleus is represented as $_{4}^{6} X$

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