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Question
In the formula, 2n2 for finding the maximum number of electrons in an orbit, what does the 'n' represent?
Options:
A .  Number of electrons in the atom
B .  The orbit's or shell's serial number
C .  Mass number of the element
D .  Atomic number of the element
Answer: Option B
:
B
According to Niels Bohr, the shells or orbits in which electrons are present in an atom are represented by K (n=1), L (n=2), M (n=3), N (n=4). The term, 'n' represent the orbit's number. For instance, n=1 represents thefirst orbit; n=2 represents thesecond orbit.

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