Question

In the formula, $2n^2$ for finding the maximum number of electrons in an orbit, what does the letter 'n' represent?

• A. Number of electrons
• B. The orbit's or shell's serial number
• C. Mass number
• D. Atomic number

Answer 1

The correct option is B

The orbit's or shell's serial number

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' represents the orbit's number. For instance, n=1 represents the first orbit; n=2 represents the second orbit.