bond length

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juliefilice 4A
Posts: 31
Joined: Fri Sep 28, 2018 12:27 am

bond length

Postby juliefilice 4A » Fri Dec 07, 2018 3:34 pm

Why is the PF bond in PF3 longer than the NF bond in NF3? This is from homework problem 2.25

305144105
Posts: 32
Joined: Thu May 10, 2018 3:00 am

Re: bond length

Postby 305144105 » Fri Dec 07, 2018 5:58 pm

P has one more valence shell than N. This results in a larger atomic radius, a larger covalent radius, and thus, a longer bond length.

Joaquin Andrade
Posts: 31
Joined: Fri Sep 28, 2018 12:27 am

Re: bond length

Postby Joaquin Andrade » Fri Dec 07, 2018 10:01 pm

Because of the shielding effect - since P is a period down from N it has more electrons and thus the pull of the nucleus is weaker, thereby increasing the covalent radius and thus the bond length.

305117729
Posts: 30
Joined: Fri Sep 28, 2018 12:16 am

Re: bond length

Postby 305117729 » Fri Dec 07, 2018 10:03 pm

P has more shells of electron and less attraction from the nucleus.


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