Question

What is 2n^2rule? Define it

Answer 1

Answer:The maximum number of electrons present in a particular shell is calculated by the 2n^2  rule

, where “n” represents the shell number. For example, K shell is the first shell and it can hold up to 2(1)^2 = 2 electrons. Similarly, L shell is the second shell and it can hold up to 2(2)^2 = 8 electrons. This formula helps to calculate the maximum number of electrons that an orbit can accommodate.

Explanation:

example :1) Helium

The atomic number of the element = 2. The total number of electrons present in Helium = 2. The maximum number of electrons in K shell (1st orbit) = 2. Therefore, shells needed = 1.

Answer 2

Answer:

2n^2 is d formula used to find the electronic configuration of elements, where n denotes d number of shell. and so on !!