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Transition elements are elements of :

As block

Bp block

Cf block

Dd block

Answer:

D. d block

Read Explanation:

  • Elements in which last electron enters in d orbitals are known as d-block elements.
  • All transition elements are d block elements and have unpaired d-orbital electron/s either in their ground state or in any stable excited state.

  • For some d-block elements like Zn, Cd, and Hg, the ground state or stable excited state lacks unpaired electron in d-orbital.
  • So, these elements do not show most of the properties of transition element. Thus, on the basis of electronic configuration, all d block elements such as Zn, Cd and Hg are not the transition elements.

Related Questions:

കപടസംക്രമണ മൂലകത്തിന് ഉദാഹരണമാണ് :
ലെഡ് ആവർത്തന പട്ടികയിൽ ഏത് കുടുംബത്തിൽ പെടുന്നു ?

Consider the below statements and identify the correct answer

  1. Statement 1: Dobereiner gave the law of triads.
  2. Statement II: Dobereiner tried to arrange the elements with different properties into groups, having three elements each.

    Choose the pair of isotones from the following.

    (A) 8O17& 8O16

    (B) 12 Mg24&11Na24

    (C)18Ar40 &19K40

    (D)11Na23&12Mg24

    Which of the following triads is NOT a Dobereiner's triad?

    1. (i) Li, Na. K
    2. (ii) Ca, Sr, Ba
    3. (iii) N, P, Sb
    4. (iv) Cl, Br, I