Question

why 3F is not possible?​

Answer 1

Answer:

in the first shell, there is only the one S orbital, as this shell can have a maximum of only two electrons. therefore, the 1 p orbital does not exist. in the second shell both 2S and 2P orbital exist. as it can have a maximum of 8 electrons. therefore the 3F orbital does not exist.

Answer 2

Answer:

Therefore, the 1p orbital doesn't exist. In the second shell, both 2s and 2p orbitals exist, as it can have a maximum of 8 electrons. In the third shell, only the 3s, 3p and 3d orbitals exist, as it can hold a maximum of 18 electrons. Therefore, the 3f orbitals do not exist.