Question

Explain Aufbau principle class 11......

Answer 1

The physical and chemical properties of elements is determined by the atomic structure. The atomic structure is, in turn, determined by the electrons and which shells, subshells and orbitals they reside in. The rules af placing electrons within shells is known as the Aufbau principle. These rules are:

1.

Electrons are placed in the lowest energetically available subshell.

2.

An orbital can hold at most 2 electrons.

3.

If two or more energetically equivalent orbitals are available (e.g., p, d etc.) then electrons should be spread out before they are paired up (Hund's rule).

Answer 2

Step-by-step explanation:

Aufbau principal;

answer is in attachment