Question

Find the atomic number of the element whose electron configuration is 2 8 5

Answer 1

Total number of electrons is 15.
Hence the element is Phosphorous.

Answer 2

The atomic number of the element whose electron configuration is 2, 8, 5 is 15.

Explanation:

Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom.

The given electronic configuration is, $1s^22s^22p^63s^23p^3$  or 2,8,5.

Number of electrons = 2 + 8+5 = 15 electrons

And as we know that atomic number is equal to the number of electrons. So, the number of electrons is 15 , the atomic number of the element will be 15 and the element is phosphorous.

Learn More about electronic configuration

https://brainly.com/question/549647

https://brainly.com/question/1454818