Answer :
To understand the question, let's break it down into two parts.
Increasing Order of Energy of the Orbitals:
In atomic structure, the energy levels of orbitals are determined by both the principal quantum number [tex]n[/tex] and the azimuthal quantum number [tex]l[/tex]. The order of filling orbitals is given by the Aufbau principle, which states that electrons occupy the lowest energy orbitals first. According to this principle and Hund's rule, as well as the Pauli exclusion principle, the increasing order of energy for the given orbitals is:
[tex]\text{4s} < \text{3d} < \text{4p}[/tex].
Therefore, the correct choice for the order of increasing energy is b) 4s < 3d < 4p.
Maximum Number of Electrons in a [tex]p[/tex] Subshell:
The [tex]p[/tex] subshell can hold a maximum of 6 electrons. This is because a [tex]p[/tex] subshell consists of 3 orbitals, and each orbital can hold 2 electrons (with opposite spins), so:
[tex]3 \text{ orbitals} \times 2 \text{ electrons per orbital} = 6 \text{ electrons}[/tex].
Therefore, the correct answer is b) 6.
In summary:
- The increasing order of energy of the orbitals is: b) 4s < 3d < 4p.
- The maximum number of electrons in a [tex]p[/tex] subshell is: b) 6.
