Question #55b04

2 Answers
Feb 2, 2018

Please read below;

Explanation:

The element is selenium (Se)

It has atomic number of 34

Its electronic configuration is [Ar]3d104s24p4or4s23d104s24p4

Electron per shell is 2,8,18,6

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

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.