Question #55b04

2 Answers
Jumbotron
Feb 2, 2018

Please read below;

Explanation:

The element is selenium (Se)

It has atomic number of 34

Its electronic configuration is [Ar] 3d^10 4s^2 4p^4 or 4s^2 3d^10 4s^2 4p^4

Electron per shell is 2,8,18,6

Therefore, It need to gain two electrons (2e^-) to attain the octet structure or be stable..

Jarni Renz
Feb 2, 2018

"The element is located in Period 4 and in Group 16" "and it is identified as Selenium(Se)". "This element will gain 2 more electrons to achieve stability."

Explanation:

The highest energy level is 4 which means that the element is located in "Period " 4 and that the valence electron is 6; that is, 2e^- in the s " sublevel" and 4e^- in p " sublevel". which means that the element is in "Group " 16

Using the periodic table, this element is identified as "Selenium" (Se)

Since the element is a nonmetal; the tendency is to gain 2e^- to complete an octet and achieve stability.

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