What are the position of d-and f-Block Elements? How many marks carried by the chapter the d-and f-Block Elements in class 12 board examination? Why we study the chapter, the d-and f-Block Elements? What is transition element? This video will help you to score all 5 marks in the chapter, the d-and f-Block Elements.
Those elements having a partially filled d or f subshell in any common oxidation state are said to be transition elements. The term "transition elements" most commonly refers to the d-block transition elements. The 2B elements zinc, cadmium and mercury do not strictly meet the defining properties, but are usually included with the transition elements because of their similar properties. A different term is used for the f-block transition elements that is "inner transition elements". The first row of them is called the lanthanides or rare earths. The second row consists of the actinides. All of the actinides are radioactive and those above Z=92 are manmade in nuclear reactors or accelerators. The transition elements are usually having high melting point metals, several oxidation states. usually form colored compounds and they are often paramagnetic.
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