Which of the following statements is/are correct?
i.Principal energy levels are identified by the letters s,p,d,and f
ii.Principal energy levels appear in both the quantum mechanical model of the atom and the Bohr model of the atom
iii.In general,n = 1 is at lower energy than n = 2,and n = 2 is lower than n = 3,and so on
iv.The principal energy level is related to electron spin
A)i only
B)iv only
C)i and ii
D)ii and iii
E)iii and iv

Question

Quizplus · Accepted Answer

i. Incorrect - The letters s, p, d, and f identify sublevels or subshells within a principal energy level, not the principal energy levels themselves. Principal energy levels are identified by the principal quantum number, n.ii. Correct - Principal energy levels are a concept that appears in both the quantum mechanical model and the Bohr model of the atom. In the Bohr model, they are depicted as orbits around the nucleus, while in the quantum mechanical model, they are described by the principal quantum number, n.iii. Correct - In general, the principal quantum number, n, indicates the energy level of an electron in an atom. The higher the value of n, the higher the energy level. Thus, n = 1 is at a lower energy than n = 2, and so on.iv. Incorrect - The principal energy level is related to the size and energy of the electron orbitals but not directly to electron spin. Electron spin is described by the spin quantum number, not the principal quantum number.

Which of the Following Statements Is/are Correct