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Electronic configuration of a transition element X in +3 oxidation state is [Ar] 3d5 and Y in +2 state is [Ar] 3d8. What are the atom ic numbers of the elements?
  • a)
    23 and 26
  • b)
    26 and 28
  • c)
    21 and 25
  • d)
    24 and 26
Correct answer is option 'B'. Can you explain this answer?
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Electronic configuration of a transition element X in +3 oxidation sta...
Fe (Z = 26) in + 3 oxidation state show Fe3+ ([Ar] 3d5) configuration. Ni(28) in +2 oxidation state show Ni2+([Ar]3d8) configuration.
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Electronic configuration of a transition element X in +3 oxidation sta...
Electronic Configuration of Transition Elements:

- Transition elements are those elements which lie in the middle of the periodic table between the s-block and p-block.
- They are characterized by the presence of partially filled d-orbitals in their electronic configuration.
- The electronic configuration of transition elements is written using the noble gas configuration of the previous element followed by the d-orbital configuration.

Electronic Configuration of X and Y:

- The electronic configuration of X in 3 oxidation state is [Ar] 3d5.
- This means that X has 5 electrons in its d-orbitals and has lost 3 electrons to achieve a +3 oxidation state.
- The atomic number of X can be calculated by looking at the electron configuration of the previous noble gas, which is argon in this case.
- Argon has an atomic number of 18, so adding 5 more electrons for the d-orbitals gives us an atomic number of 23 for X.

- The electronic configuration of Y in 2 oxidation state is [Ar] 3d8.
- This means that Y has 8 electrons in its d-orbitals and has gained 2 electrons to achieve a +2 oxidation state.
- Again, the atomic number of Y can be calculated by looking at the electron configuration of the previous noble gas, which is argon in this case.
- Adding 8 more electrons for the d-orbitals gives us an atomic number of 26 for Y.

Therefore, the correct answer is option B, which gives the atomic numbers of X and Y as 23 and 26 respectively.
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Read the passage given below and answer the following questions:The d block elements are the 40 elements contained in the four rows of ten columns (3-12) in the periodic table. As all the d block elements are metallic, the term d-block metals is synonymous. This set of d-block elements is also often identified as the transition metals, but sometimes the group 12 elements (zinc, cadmium, mercury) are excluded from the transition metals as the transition elements are defined as those with partly filled d or f shells in their compounds. Inclusion of the elements zinc, cadmium and mercury is necessary as some properties of the group 12 elements are appropriate logically to include with a discussion of transition metal chemistry. The term transition element or transition metal appeared to derive from early studies of periodicity such as the Mendeleev periodic table of the elements. His horizontal table of the elements was an attempt to group the elements together so that the chemistry of elements might be explained and predicted. In this table there are eight groups labeled I-VIII with each subdivided into A and B subgroups. Mendeleev recognized that certain properties of elements in Group VIII are related to those of some of the elements in Group VII and those at the start of the next row Group I. In that sense, these elements might be described as possessing properties transitional from one row of the table to the next.In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion (

Read the passage given below and answer the following questions:The d block elements are the 40 elements contained in the four rows of ten columns (3-12) in the periodic table. As all the d block elements are metallic, the term d-block metals is synonymous. This set of d-block elements is also often identified as the transition metals, but sometimes the group 12 elements (zinc, cadmium, mercury) are excluded from the transition metals as the transition elements are defined as those with partly filled d or f shells in their compounds. Inclusion of the elements zinc, cadmium and mercury is necessary as some properties of the group 12 elements are appropriate logically to include with a discussion of transition metal chemistry. The term transition element or transition metal appeared to derive from early studies of periodicity such as the Mendeleev periodic table of the elements. His horizontal table of the elements was an attempt to group the elements together so that the chemistry of elements might be explained and predicted. In this table there are eight groups labeled I-VIII with each subdivided into A and B subgroups. Mendeleev recognized that certain properties of elements in Group VIII are related to those of some of the elements in Group VII and those at the start of the next row Group I. In that sense, these elements might be described as possessing properties transitional from one row of the table to the next.In the following questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion (

Electronic configuration of a transition element X in +3 oxidation state is [Ar] 3d5 and Y in +2 state is [Ar] 3d8. What are the atom ic numbers of the elements?a)23 and 26b)26 and 28c)21 and 25d)24 and 26Correct answer is option 'B'. Can you explain this answer?
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Electronic configuration of a transition element X in +3 oxidation state is [Ar] 3d5 and Y in +2 state is [Ar] 3d8. What are the atom ic numbers of the elements?a)23 and 26b)26 and 28c)21 and 25d)24 and 26Correct answer is option 'B'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Electronic configuration of a transition element X in +3 oxidation state is [Ar] 3d5 and Y in +2 state is [Ar] 3d8. What are the atom ic numbers of the elements?a)23 and 26b)26 and 28c)21 and 25d)24 and 26Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Electronic configuration of a transition element X in +3 oxidation state is [Ar] 3d5 and Y in +2 state is [Ar] 3d8. What are the atom ic numbers of the elements?a)23 and 26b)26 and 28c)21 and 25d)24 and 26Correct answer is option 'B'. Can you explain this answer?.
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