Why is helium placed in p-block elements although its last electron enters in the s-orbital ?

What are p-block elements ?

What are s-block elements ?

Which of the d-block elements are not regarded as transition elements and why ?

The p-block element that forms predominantly basic oxide is

What is the magnetic moment of an electron due to its orbital motion?

The aufbau principle implies that a new electron will enter an orbital for which:

What are transition elements ? Which of the d block elements are not regarded as transition elements and why ?

What are f-block elements ? Write their general electronic configuration.