Question

The shell around the nucleus can be numbered from near to the nucleus as 1,2,3,4,
5 or represented by the letters, K, L, M, N, O​

Answer 1

Answer:

These orbits or shells are called energy levels. These orbits or shells are represented by the letters K, L, M, N... or the numbers, n=1, 2, 3, 4... The first orbit (i.e., for n = 1) is represented by letter K.