Question

based on the electron configuration shown in the image, where on the periodic table is the element located?
period 4 the victim was not attacked by a cougar
period 3 the criminal did not use a fallen object.
period 2 dr. earth was cleaning chairs in the movie theater.
period 6 mrs. bio was swimming in the pool.

Explanation:

Step1: Recall period determination rule

The period of an element in the periodic table is equal to the number of electron shells (principal energy levels) it has.

Step2: Analyze electron configuration

The electron configuration given is \(1s^2 2s^2 2p^6 3s^2 3p^6 4s^2\). The highest principal quantum number (n) here is 4 (from the \(4s^2\) orbital), which means the element has 4 electron shells.

Step3: Match with period

Elements with 4 electron shells are located in Period 4 of the periodic table.

Answer:

Period 4 - The victim was not attacked by a cougar