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Question

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?


A

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B

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C

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D

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Solution

The correct option is B


The atomic number, Z, is equal to the number of protons, which is equal to the 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, the nucleus is represented as AZX so, this nucleus is represented as 64X


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