naming orbital configurations

[bluesdeluxe]

I'm going through Barron's DAT book and on page 114/115 they are showing how to name an element by spdf notation. I'm practicing a few elements and decided to try DY (element 66). The short hand would be [XE] 6s2 4f10 but when I look at the periodic table in the back of Barron's book it lists Dy as [XE]4f10 6s2. Page 114 indicates that the order is ...6s, 4f, 5d so I'm wondering if the periodic table in the back is using some other notation or is it flat out wrong? Any help would be appreciated

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[bluesdeluxe]

Also, I just noticed that when you name an element like Copper something funky happens around V and Cr where they are listed as [AR] 3d3 4s2 and [Ar]3d5 4s1 respectively.

Again, the periodic table seems to be switching the order from 4s2 3d3 to 3d3 4s2 but then ALSO somehow taking an electron out of the 4s orbital and putting it in the 3d orbital from [Ar] 3d3 4s2 to [Ar] 3d5 4s1.

I don't have my general chemistry book with me to look this up but the Barron book doesn't teach what is happening here so if I didn't notice it I would have thought I had this section down. I'm sure it's either wrong on their part or I'm missing something simple in filling orbitals. Anyone got an explanation?

 

[Notoriousjae]

Also, I just noticed that when you name an element like Copper something funky happens around V and Cr where they are listed as [AR] 3d3 4s2 and [Ar]3d5 4s1 respectively.

Again, the periodic table seems to be switching the order from 4s2 3d3 to 3d3 4s2 but then ALSO somehow taking an electron out of the 4s orbital and putting it in the 3d orbital from [Ar] 3d3 4s2 to [Ar] 3d5 4s1.

I don't have my general chemistry book with me to look this up but the Barron book doesn't teach what is happening here so if I didn't notice it I would have thought I had this section down. I'm sure it's either wrong on their part or I'm missing something simple in filling orbitals. Anyone got an explanation?

barron DAT book is full of errors chuck it in the trash

 

[bluesdeluxe]

well I'm using it in addition to the Kaplan Blue Dat book. My weakest area is gen chem and Barron's seems to explain things better especially on the PAT part.

Do you know which of the above notation is correct for Copper, Vandium, Chromium, and Dysprosium (Dy)?

 

[Notoriousjae]

well I'm using it in addition to the Kaplan Blue Dat book. My weakest area is gen chem and Barron's seems to explain things better especially on the PAT part.

Do you know which of the above notation is correct for Copper, Vandium, Chromium, and Dysprosium (Dy)?

Copper - 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 3d^10
or [Ar] 4s^1 3d^10

thats what you should get for the orbital configuration for copper and in a similar way for the remaining elements. I didnt work out the other three but they are solved in a similar way.
when solving for these configurations follow this order
1s
2s 2p
3s 3p 3d
4s 4p 4d 4f
5s 5p 5d 5f
6s 6p 6d
7s 7p

it follows this order 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p

 

[tom_servo_dds]

barron DAT book is full of errors chuck it in the trash

I agree with that! Outside of the PAT section it is best employed in lining a bird cage.