Embed Size (px)
Citation preview
U -
- i s t Cr EAr, ^-s 5d ^QQCtA /lArJ'+s^ Sd"^ 6^3^ « \ ^ V A
IAr2VM!_ik llA r lHs 'Sc t "
U 7 toSs'-M" ^ " Lkn 5s"^4 l O
U. UMCC € S A
- N T -eVt>Mps-.
I i/ctiuite. ■r'~€ S iiA Ov*tiLl stvOiLl
V. JLOif^pA, )
^ p l A ( A U'o L " 5 ^2,'
sVsVp Ss'
c ^ f b u o T = 4 = - e l r0 ' I
n s
- 7 ^ F I s ^ 2s 2p - '"7 \/ev(jU\a. e7Cv Bs' BpS
n
11/18/19
1
Copyright © 2020 Pearson Education, Inc. All Rights Reserved
Transition Metal Electron Configurations• The electron configurations of the transition elements (d
block) and inner transition elements (f block) exhibit trends that differ somewhat from those of the main-group elements.
• As we move to the right across a row in the d block, the d orbitals fill as shown below.
42
Copyright © 2020 Pearson Education, Inc. All Rights Reserved
Irregular Electron Configurations (2 of 2)
• Expected
• [ ] 2 4Cr Ar 4 3s d=
• [ ] 2 9Cu Ar 4 3s d=
• [ ] 2 4Mo Kr 5 4s d=
• [ ] 2 6Ru Kr 5 4s d=
• [ ] 2 8Pd Kr 5 4s d=
• Found experimentally
• [ ] 1 5Cr Ar 4 3s d=
• [ ] 1 10Cu Ar 4 3s d=
• [ ] 1 5Mo Kr 5 4s d=
• [ ] 1 7Ru Kr 5 4s d=
• [ ] 0 10Pd Kr 5 4s d=
43
^ '■ OV' "gwi I'c
J c
3WO •
2P0
100 . N J < J ^ ^h
KnJ^ Z Uie\ni't i
1peri'oA>
rxd lus
^t f<KQUt
"zfeuuj
U3HY? J <t(A) -^ c< %■%
citirsf c r ) 0 \
11/18/19
1
Copyright © 2020 Pearson Education, Inc. All Rights Reserved
Trend in Atomic Radius: Main Group (2 of 3)
• Atomic radius decreases across period (left to right).– Adding electrons to same valence shell– Effective nuclear charge increases– Valence shell held closer
53
Copyright © 2020 Pearson Education, Inc. All Rights Reserved
Trend in Atomic Radius: Main Group (3 of 3)
• Atomic radius increases down group.– Valence shell farther from nucleus– Effective nuclear charge fairly close
54
Zeff=1 -10- U -
N 0<45 U Ar
( 1 6 0 +
s"Z5 Zp 5 3f' > - ? c .
ia)UiJ" Oufe ctvtftKg/-<- -fui
^ ^CoK
reef's 5cr-ggyi" .lP_ .tW....o f ,
Q rol, across ' pen'ocf Lc\J ig<ACg €"s (rtq(2 cof -el
^dsvi^f SCr€gK\ irvucloaf .
11/18/19
2
Copyright © 2020 Pearson Education, Inc. All Rights Reserved
Periodic Trends in Atomic Radius
55
Copyright © 2020 Pearson Education, Inc. All Rights Reserved
Shielding and Effective Nuclear Charge (2 of 2)
58
Zfff r Z-S/ =11-10
,Ncx-. (s'2s'2p<'3s' =([d< 1 / 1 1 9 t o a - • ? 4 > / 1
4^ 4 - v v = 1^ -1 e.
O
v s Q-s
pCivvcipJi (StKJJ i g . k : £
Sa/Afi 2^ff <louw - • -h J' iAO( 5k elf -Ci
— Lf^ •
I
^ f f ,CgV\- Tfi rt- I iTVU
Iavl\'(5V\ / c<v co
. r
- h
e Kt cwg- €""-&V . J
ftdUf stve£l (V«HUM( ^ ' -WeJ
SaM?^ € COA \q
O
\5"Zs' O ■ \s"2s Zp^ iNJRIiaacii.
