Textbook Problem 1.E.25

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805377003
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Textbook Problem 1.E.25

Postby 805377003 » Thu Nov 12, 2020 11:37 am

Can someone explain how to do this problem?

Give the notation for the valence-shell configuration (including the outermost d-electrons) of (a) the alkali metals; (b) Group 15 elements; (c) Group 5 transition metals; (d) the “coinage” metals (Cu, Ag, Au).

Josh Chou 3K
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Re: Textbook Problem 1.E.25

Postby Josh Chou 3K » Thu Nov 12, 2020 11:55 am

The alkali metals have a valence shell with the configuration ns1, with n being the principal quantum number of the atom. Similarly, a valence shell for a group 15 atom would have the configuration ns2np3. A group 5 transition metal would have a configuration of (n-1)d3ns2. The coinage metals are an exception in that they have 10 electrons in their d shell but only 1 electron in their s shell, taking on a (n-1)d10ns1 configuration

505352202
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Re: Textbook Problem 1.E.25

Postby 505352202 » Fri Nov 13, 2020 1:43 pm

Josh Chou 1I wrote:The alkali metals have a valence shell with the configuration ns1, with n being the principal quantum number of the atom. Similarly, a valence shell for a group 15 atom would have the configuration ns2np3. A group 5 transition metal would have a configuration of (n-1)d3ns2. The coinage metals are an exception in that they have 10 electrons in their d shell but only 1 electron in their s shell, taking on a (n-1)d10ns1 configuration


I got the same answers as you did but for C the answer from the test book is
(n−1)d5 ns2
Can someone explain why this is the answer and not (n-1)d3 ns2?

Thank you!

Ivy Tan 1E
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Re: Textbook Problem 1.E.25

Postby Ivy Tan 1E » Fri Nov 13, 2020 3:06 pm

505352202 wrote:
Josh Chou 1I wrote:The alkali metals have a valence shell with the configuration ns1, with n being the principal quantum number of the atom. Similarly, a valence shell for a group 15 atom would have the configuration ns2np3. A group 5 transition metal would have a configuration of (n-1)d3ns2. The coinage metals are an exception in that they have 10 electrons in their d shell but only 1 electron in their s shell, taking on a (n-1)d10ns1 configuration


I got the same answers as you did but for C the answer from the test book is
(n−1)d5 ns2
Can someone explain why this is the answer and not (n-1)d3 ns2?

Thank you!


Hi!
The solutions manual on sapling says that the answer to C) is (n-1)d3ns2 for group 5 transition metals, which is correct because group 5 metals have 3 valence electrons in the d orbital and 2 valence electrons in the s orbital (maybe you were looking at the wrong question possibly?) Hope this clarifies though!

505352202
Posts: 60
Joined: Wed Sep 30, 2020 10:06 pm
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Re: Textbook Problem 1.E.25

Postby 505352202 » Fri Nov 13, 2020 6:27 pm

Ivy Tan 1F wrote:
505352202 wrote:
Josh Chou 1I wrote:The alkali metals have a valence shell with the configuration ns1, with n being the principal quantum number of the atom. Similarly, a valence shell for a group 15 atom would have the configuration ns2np3. A group 5 transition metal would have a configuration of (n-1)d3ns2. The coinage metals are an exception in that they have 10 electrons in their d shell but only 1 electron in their s shell, taking on a (n-1)d10ns1 configuration


I got the same answers as you did but for C the answer from the test book is
(n−1)d5 ns2
Can someone explain why this is the answer and not (n-1)d3 ns2?

Thank you!


Hi!
The solutions manual on sapling says that the answer to C) is (n-1)d3ns2 for group 5 transition metals, which is correct because group 5 metals have 3 valence electrons in the d orbital and 2 valence electrons in the s orbital (maybe you were looking at the wrong question possibly?) Hope this clarifies though!


I thought I was looking at the wrong question too but I don't think I am. Here is the link to the screenshot of the textbook answer for 1.E.25 https://drive.google.com/file/d/15V9YZz ... sp=sharing

Am I looking at the wrong thing? Thanks for the help!

Katie Lam 2J
Posts: 93
Joined: Wed Sep 30, 2020 9:35 pm

Re: Textbook Problem 1.E.25

Postby Katie Lam 2J » Sat Nov 14, 2020 2:42 pm

505352202 wrote:
Ivy Tan 1F wrote:
505352202 wrote:
I got the same answers as you did but for C the answer from the test book is
(n−1)d5 ns2
Can someone explain why this is the answer and not (n-1)d3 ns2?

Thank you!


Hi!
The solutions manual on sapling says that the answer to C) is (n-1)d3ns2 for group 5 transition metals, which is correct because group 5 metals have 3 valence electrons in the d orbital and 2 valence electrons in the s orbital (maybe you were looking at the wrong question possibly?) Hope this clarifies though!


I thought I was looking at the wrong question too but I don't think I am. Here is the link to the screenshot of the textbook answer for 1.E.25 https://drive.google.com/file/d/15V9YZz ... sp=sharing

Am I looking at the wrong thing? Thanks for the help!

I don't think you are looking at the wrong thing. I got (n-1)d3ns2 as well, so I believe the answer for 1E.25 c) is a typo.

505352202
Posts: 60
Joined: Wed Sep 30, 2020 10:06 pm
Been upvoted: 1 time

Re: Textbook Problem 1.E.25

Postby 505352202 » Sat Nov 14, 2020 3:31 pm

Katie Lam 2G wrote:
505352202 wrote:
Ivy Tan 1F wrote:
Hi!
The solutions manual on sapling says that the answer to C) is (n-1)d3ns2 for group 5 transition metals, which is correct because group 5 metals have 3 valence electrons in the d orbital and 2 valence electrons in the s orbital (maybe you were looking at the wrong question possibly?) Hope this clarifies though!


I thought I was looking at the wrong question too but I don't think I am. Here is the link to the screenshot of the textbook answer for 1.E.25 https://drive.google.com/file/d/15V9YZz ... sp=sharing

Am I looking at the wrong thing? Thanks for the help!

I don't think you are looking at the wrong thing. I got (n-1)d3ns2 as well, so I believe the answer for 1E.25 c) is a typo.



Thank you!

Anirudh Mahadev 1G
Posts: 141
Joined: Wed Sep 30, 2020 9:39 pm

Re: Textbook Problem 1.E.25

Postby Anirudh Mahadev 1G » Sun Nov 15, 2020 6:50 pm

I had the same issue, thank you everyone!


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