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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