Respuesta :
a. In the following list 4s orbital can be filled before 4p orbital.
b. The maximum number of electrons in 4s subshell is 2.
c. An electron in an orbital has 4 quantum numbers n, l, ml, ms.
According to the Aufbau principle, electrons first occupy lower-energy atomic orbitals before moving on to higher-energy ones. Hence 4s orbitals filled before 4p followed by filled d orbitals. similarly the maximum capacity of s subshell to hold electron is 2, while p subshell is 6, 10 for d subshell and 14 for f subshell. Electron in an orbital can be completely described by principle quantum number n which represents the main electronic shell, Azimuthal quantum number l determines an orbital's shape, magnetic quantum number ml defines how many orbits there are and how they are oriented within a subshell and spin quantum number ms describes the spin of electrons.
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