HW 3.39 part (b) and (c)

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Jacob Afable 3J
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Joined: Fri Sep 25, 2015 3:00 am

HW 3.39 part (b) and (c)

Postby Jacob Afable 3J » Thu Oct 15, 2015 10:04 pm

Write the complete Lewis structure for each of the following compounds: (b) potassium phosphide

Hi, could someone please explain why the Lewis structures appear the way they are in the solutions manual. For part (b), why are the Potassium ions not bonding with Phosphorus but rather floating around it?

Christine Van 2E
Posts: 47
Joined: Fri Sep 25, 2015 3:00 am

Re: HW 3.39 part (b) and (c)

Postby Christine Van 2E » Sat Oct 17, 2015 11:39 am

Hi!

The potassium ions aren't bonded to the phosphorus atom because these are ionic compounds, not molecules(where electrons are shared). Ionic compounds don't usually have paired electrons because the anion usually takes electrons from the cation. In this case, the phosphorus(anion) takes electrons away from the potassium(cation), so that's why they just float around it.

Hope that helps!

Jacob Afable 3J
Posts: 41
Joined: Fri Sep 25, 2015 3:00 am

Re: HW 3.39 part (b) and (c)

Postby Jacob Afable 3J » Tue Oct 20, 2015 11:30 pm

Christine Van 1E wrote:Hi!

The potassium ions aren't bonded to the phosphorus atom because these are ionic compounds, not molecules(where electrons are shared). Ionic compounds don't usually have paired electrons because the anion usually takes electrons from the cation. In this case, the phosphorus(anion) takes electrons away from the potassium(cation), so that's why they just float around it.

Hope that helps!


Thanks so much!


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