The d- and f- Block Element Block Elements
of the groups 3-12 in which the d orbitals are progressively filled in each of the four long periods. The elements constituting the f -block are those in.
Unit 4: Chemistry of d-block elements
(a) size of atoms & ions. (b) reactivity. (c) catalytic activity. (d) oxidation state. (e) complex formation ability. (f) colour. (g) magnetic properties.
d and f – Block Elements
7 are offen classified as interstitial compounds. 12. Catalytic properties:Many transition metals and their compounds show catalytic properties the most common
d AND f-BLOCK ELEMENTS
15-Feb-2019 d-block elements are classified into four series viz 3d 4d
d AND f-BLOCK ELEMENTS
15-Feb-2019 d-block elements are classified into four series viz 3d 4d
The p-Block Elements
Objectives. Diversity in chemistry is the hallmark of p–block elements manifested in their ability to react with the elements of s– d– and f–blocks as.
D:DBTChemistry XICHEMISTRY-X
I am happy that support material for classes IX to XII has been 11. p-Block Elements. 170. 12. Organic Chemistry : Some basic Principles and Techniques.
CLASSIFICATION OF ELEMENTS AND PERIODICITY IN
fact that the chemical elements are not a random cluster of classify elements into s p
B. Sc. II YEAR INORGANIC CHEMISTRY-II
characteristic properties of the d-block elements in general
CHEMISTRY (862)
Some p -Block Elements. 12. Organic Chemistry: Some basic Principles and Techniques. Organic Chemistry. 23 Marks. 13. Hydrocarbons.
d AND f BLOCK
ELEMENTS
d-BLOCK ELEMENTS1. INTRODUCTION
The elements in which the last electron enters (n - 1)d orbitals of the atom are called d-block elements. Also, these
elements lie in between s and p block elements in the long form of the periodic table. So, they are also called
transition elements.2. ELECTRONIC CONFIGURATION AND IRREGULARITIES
1-10 ns 0,1,2 . All the th main shell. Each series 1 10 1 1 10 0 10 1 10 1 ) clearly show 2 Mn 2+ Fe 2 Fe 2+Vaibhav Krishnan (JEE 2009 AIR 22)
Illustration 1:
(JEE MAIN) Sol:E.g. Mn
2+ , Sc 0 , Zn 2+ 1031.2 | d and f-block Elements
Illustration 2:
8 (JEE ADVANCED) +2, + 7 8 +23. GENERAL PROPERTIES OF THE TRANSITION METALS
3.1 Atomic and Ionic Radii
(a)The atomic and ionic radii for transition elements are smaller than their corresponding s-block elements and are greater than their corresponding p-block elements.
(b) 21Sc to Fe to Zn 17 16 15 14 13 12 11
ScTiVCrMnFeCoNiCuZn
Atomic radii of element
the period. An increase in ENC favors a decrease in atomic radii, whereas (c) and Hf have (d) Ti 2+ > Ti > Ti Cr 2+ > Cr > Cr > Cr Fe 2+ > Fe (e) Sc 2+ Ti 2+ V 2+ Cr 2- Mn 2+ Fe 2+ Co 2+ Ni 2+ 2+Illustration 3:
(JEE MAIN) Sol:Chemistry | 31.3
3.2 Atomic Volume and Density
(a) (b) (c)The density, however, increases along the period.
(a) (b)It is evident from that the melting point of transition metals or a given series increases on moving left to right the middle of the period (d
1 to d to d 10 ). An increase 35003000
2500
2000
1500
1000
500
Melting point (K
Groups123456789101112
(4d-series) (3d-series) (5d-series) LaScY TiZr Hf VCr Fe Mn CoNi Hg Cd ZnAgAuCuPdNb
Tc RhlrRuMoTa
W Re Os lr Pt3.4 Metallic Character
(a) (b) possess hcp, bcc or ccp crystal lattices. (c) (d) (e)31.4 | d and f-block Elements
(f) (a) electropositive character than s-block (b) (c) (d) transition elements.Transition elements
-2 -1 lrCu(3d)
Nikhil Khandelwal (JEE 2010 AIR 443)
Illustration 4:
-1Why? (JEE ADVANCED)
Sol:MASTERJEE CONCEPTS
Chemistry | 31.5
3.7 Reactivity
(a) (i) (ii) M (s) o M (g) o (g) M (g) M o (aq) M M (s) + H 2 O o (aq) M0RUHQHJDWLYHWKHYDOXHRI
(aq) M (a) (b) (i) 21GXHWRV (ii) 22
GXHWRV (iii) GXHWRV (iv)
GXHWRV
(v) GXHWRVNeeraj Toshniwal (JEE 2009 AIR 21)
Illustration 5:
(JEE ADVANCED) Sol:MASTERJEE CONCEPTS
31.6 | d and f-block Elements
3.9 Colour
In the s-and p-block elements, there cannot be any d-d transistions and the energy needed to promote the s or p
Table 31.1:
Colour absorbedColour observed
UV region
VioletYellow-green
IndigoYellow
Orange
RedYellow-greenViolet
YellowIndigo
Orange
RedInfra-red
Illustration 6:
, Ag , Zn 2+ , Hg 2+ and Cd 2+ (JEE ADVANCED) Sol: electrons in them and the d-orbital [(n - 1)d 10 n(n2 ) B.M.Chemistry | 31.7
Illustration 7:
(JEE MAIN) Sol: P PAman Gour (JEE 2012 AIR 230)
4. SOME IMPORTANT COMPOUNDS OF d-BLOCK ELEMENTS
4.1 Chromate and Dichromate
(a) 3UHSDUDWLRQ o o (b) (c) (i) o (ii) (iii) o (iv) o (v)CrOCrOCr
O O O O O O (vi) K 2 Cr 2 O 7 o (vii) o7KHR[LGDWLRQVWDWHRI&UFKDQJHVIURPWR
MASTERJEE CONCEPTS
31.8 | d and f-block Elements
(d) Uses: ions, etc. (i) (ii) In dyeing chrome tanning, calico printing, photography etc. (iii)Chromic acid as a cleansing agent for glass ware
2 CO 2 MnO 2MnO 2 2 2K 2 M nO + 2H 2 O 2MnO 2 + 2K 2 CO + O 2K 2 MnO + 2CO 2 2K 2 MnO + Cl 2 2KMnO + 2KCl 2K 2 MnO + H 2 O + O 2KMnO + 2KOH + O 2 2 MnO + 2CO 2 2KMnO + MnO 2 + 2K 2 CO 2 MnO + 2H 2 SO 2KMnO + MnO 2 + 2K 2 SOquotesdbs_dbs12.pdfusesText_18[PDF] d and f block elements iit jee notes pdf
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