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Shweta Thakur posted an Question

August 20, 2020 • 02:40 am

30 points

IIT JAM
Chemistry (CY)

Why zn ,cd hg are not transition elemants

why Zn ,Cd Hg are not transition elemantsvkgo hhgjh lgi

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Priya barik

since zn, cd & Hg has fully filled d10 configuration in their ground state therefore they do not show property of typically transistion elements and are not regarded as transition elements.
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Dinesh khalmaniya 1

because these have fully filled orbital in ground state as well as in excited state. while transition metals are those which have vacant d orbitals
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got it?
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Zinc (Zn), cadmium (Cd) and mercury (Hg) are last d-elements in their periods. Their outer electron configuration is (n — 1)d 10ns 2. They form +2 ions only (M +2 ions) which have configuration (n — 1)d 10. As the elements or the ions they form have full filled (n — 1)d orbitals, they are not true transition elements.
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any doubt?
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no sir ..thanku
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Priyanshu kumar Best Answer

The electronic configurations of Zn, Cd and Hg are represented by the general formula (n-1)d10 ns2. The orbitals in these elements are completely filled in the ground state as well as in their common oxidation states. Therefore, they are not regarded as transition elements.
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This doesn't satisfy the condition of transition metal elements
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No partially filled d orbitals in ground state as well in their common O.S
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Got it Shweta??
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yes ..then why their position is in d block
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Due to some similarities in properties
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o
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k
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https://youtu.be/RwLmIEYAH0w
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see this short video
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ok
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thanku sir🙏
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you're always welcome shweta😊
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Suman Kumar

They are d10 system
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Transition metal are those metal which have partially filled d orbital
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Transition elements are characterized by partially filled (n-1) d subshells. Zn, Cd and Hg are not regarded as transition elements as they have completely filled (n-1)d subshell. The electronic configuration of zinc is [Ar]3d104s2. The electronic configuration of cadmium is [Kr]4d105s2. The electronic configuration of mercury is [Xe]5d106s2.
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thanku
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you are welcome Sweta 😘
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please mark thankyou 🙏 Sweta
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Sweta you always do this to me😔
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