The electron enters into 4 s orbital after filling 3 p orbital but not into 3d . Explain the reason .

Why does an electron enter 4s orbital but not 3d after completely filling 3p orbital?

The electron after filling 5d sublevel enters

Number of nodes in 3p orbital is

Number of nodes in 3p orbital is

After filling up ‘4s’ orbital the electron enters:

The bromine atom possesses 35 electrons. It contains 6 electrons in 2p orbital, 6 electrons in 3p orbital and 5 electrons in 4p orbital. Which of these electrons experience the lowest effective nuclear charge ?

The number of radial nodes present in 3p orbital is

The total number of electrons present in all the 's' orbitals, all the 'p' ortitals and all the 'd' orbitals of cesium ion are respectively

The number of radial nodes present in 3 P orbital is