d and s blocks

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torialmquist1F
Posts: 49
Joined: Sat Jul 22, 2017 3:00 am

d and s blocks

Postby torialmquist1F » Thu Oct 26, 2017 8:51 pm

Why is the d block written before the s block? Could they be interchangeable or it has to be that way?

Leon Popa
Posts: 18
Joined: Fri Sep 29, 2017 7:04 am

Re: d and s blocks

Postby Leon Popa » Thu Oct 26, 2017 8:58 pm

As far as my understanding goes,

The s, p, d and f orbitals are ordered on the basis of how many electrons can fit in each orbital. Because s orbitals can only fit 2 electrons, s is written.

p-orbitals can fit 6 electrons total, d-orbitals can fit 10 electrons total, and f-orbitals can fit 14 electrons total.

Therefore, we write p after s, d after p, and f after p. Its a matter of ordering based on increasing numbers of electrons that can fit in each orbital. This eliminates the confusion of writing the orbitals out of order.

Hope that helps,

Best,
- Leon.

Wenxin Fan 1J
Posts: 53
Joined: Thu Jul 13, 2017 3:00 am

Re: d and s blocks

Postby Wenxin Fan 1J » Fri Oct 27, 2017 3:47 am

You write the electron configuration in the order of the principle quantum number "n". The n value of the d sub shell is n-1 compared to the s and the p subshell. Therefore, d is written first.

204918982
Posts: 50
Joined: Fri Sep 29, 2017 7:04 am

Re: d and s blocks

Postby 204918982 » Fri Oct 27, 2017 8:15 pm

the energy of (n)s is greater than (n-1)d so you write the d block before the s block. For example: 3d is written before 4s because the energy of 4s is greater than the energy of 3d

Peter Dis1G
Posts: 97
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Re: d and s blocks

Postby Peter Dis1G » Sun Oct 29, 2017 9:50 pm

Most of the time quantum numbers are written in order,except for 2 elements,Cr and Cu.

AtreyiMitra2L
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Re: d and s blocks

Postby AtreyiMitra2L » Sun Oct 29, 2017 10:43 pm

D blocks are lower in energy than s blocks when they are filled. For this reason, they are written before.

Clement Ng
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Re: d and s blocks

Postby Clement Ng » Sun Oct 29, 2017 10:58 pm

S blocks are written before d blocks always, unless the n value of s is equal or higher than the n value of d.

Meredith Steinberg 2E
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Joined: Thu Jul 13, 2017 3:00 am

Re: d and s blocks

Postby Meredith Steinberg 2E » Tue Oct 31, 2017 10:02 am

You write the electron configuration in order of increasing energy. Since n=3 is lower energy than n=4, 3d is written before 4s even though 4s comes first in the periodic table.

Navleen Bajwa 3A
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Joined: Fri Sep 29, 2017 7:06 am

Re: d and s blocks

Postby Navleen Bajwa 3A » Thu Nov 02, 2017 4:59 pm

I was confused by this at first too. The d block is listed first before the s block because the d block contains less energy than the s block. The principal quantum number "n" has more energy in comparison to "n-1." Therefore, the 3d would be written before 4s.

Sarah Brauer
Posts: 17
Joined: Fri Sep 29, 2017 7:06 am

Re: d and s blocks

Postby Sarah Brauer » Fri Nov 03, 2017 12:01 am

The d block is lower energy! Also, remember that if you are in the d block the 4th period would be 3d and the 5th period would be 4d

isauramora3K
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Joined: Fri Sep 29, 2017 7:07 am

Re: d and s blocks

Postby isauramora3K » Sat Nov 04, 2017 4:34 pm

The energy levels go as following (lowest to highest): f, d, s, and p. F is (n-2) and d is (n-1).

Christy Zhao 1H
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Joined: Fri Sep 29, 2017 7:07 am

Re: d and s blocks

Postby Christy Zhao 1H » Sun Nov 05, 2017 1:39 pm

The electronic configuration is written based on the principle quantum number(n), in the order of increasing energy. S blocks have a greater n value than d blocks.

Dayanara Ruiz
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Joined: Fri Sep 29, 2017 7:03 am

Re: d and s blocks

Postby Dayanara Ruiz » Sun Nov 05, 2017 3:44 pm

Simplest Answer: The energy level in the d block is less than the energy level in the d block.

Karan Singh Lecture 3
Posts: 23
Joined: Fri Sep 29, 2017 7:07 am

Re: d and s blocks

Postby Karan Singh Lecture 3 » Sun Nov 05, 2017 4:21 pm

The d block is listed before the s block because it is more stable and represents the flow the of energy.

Jesus Rodriguez 1J
Posts: 53
Joined: Sat Jul 22, 2017 3:00 am

Re: d and s blocks

Postby Jesus Rodriguez 1J » Sun Nov 05, 2017 5:03 pm

The d block is written before the s block because the d block is lower in energy. Since electron configurations are written based on increasing energy d would always come before s.

Anthony Mercado 1K
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Joined: Fri Apr 06, 2018 11:04 am

Re: d and s blocks

Postby Anthony Mercado 1K » Tue Apr 24, 2018 11:36 pm

Why is there no energy level after the f block? By having energy levels end at the f block, what is this representative of?

Steven Luong 1E
Posts: 33
Joined: Fri Apr 06, 2018 11:03 am

Re: d and s blocks

Postby Steven Luong 1E » Wed Apr 25, 2018 8:07 pm

This is because we haven't found any new elements to fit levels after f.


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