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What is the position of the element in t...

What is the position of the element in the periodic table satisfying the electronic configuration `(n-1)d^1 ns^2` for n = 4?

A

`3^(rd)` period and `3^(rd)` group

B

`4^(rd)` period and `3^(rd)` group

C

`3^(rd)` period and `2^(rd)` group

D

`4^(rd)` period and `2^(rd)` group

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To determine the position of the element in the periodic table with the electronic configuration `(n-1)d^1 ns^2` for `n = 4`, we can follow these steps: ### Step 1: Substitute the value of n Given that `n = 4`, we can substitute this value into the electronic configuration: - The configuration becomes `(4-1)d^1 4s^2`, which simplifies to `3d^1 4s^2`. ### Step 2: Identify the order of filling According to the Aufbau principle, electrons fill orbitals in order of increasing energy. The order of filling is determined by the (n + l) rule: - For `4s`, n = 4 and l = 0, so n + l = 4. - For `3d`, n = 3 and l = 2, so n + l = 5. Since `4s` has a lower (n + l) value, it gets filled before `3d`. ### Step 3: Write the complete electronic configuration The complete electronic configuration for the element is: - `4s^2 3d^1`. ### Step 4: Determine the group and period - The `4s^2` indicates that the element is in the 4th period of the periodic table. - The presence of `3d^1` indicates that it is in the d-block of the periodic table. In the d-block, the first group corresponds to `d^1`, which means it is in the 3rd group. ### Conclusion Thus, the position of the element in the periodic table is: - **Period:** 4 - **Group:** 3 The element with the electronic configuration `3d^1 4s^2` is Titanium (Ti).
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Knowledge Check

  • Numerous forms of the periodic table have been revised from time to time. A modern verion, which is most convenient and widely used is the long or extended from the periodic table. The aufbau principle (electrons are filled in the progressive order of their increasing energy i.e., by n + l rule) and the electronic configuration of atom provides a theoretical foundation for the periodic classification. The horizontal rows are called periods. There are altogether seven periods. The first period consists of 2 elements. The subsequent periods consist of 8, 8, 18 and 32 elements respectively. The seventh maximum of 32 elements. Elements having similar outer electronic configurations in their atoms are grouped in vertical columns. These are referred to as groups or famillies. According to the recommendation of IUPAC, the groups are numbered 1 to 18 replacing the older notation of groups 0, IA, IIA ..... VIIA, VIII, IB, ...... VII B. Each successive period in the periodic table is associated with the filling up of next higher principal energy level following aufbua sequence. The number of elements in each period is twice the number of atomic orbitals avaliable in the energy level that is being filled. All the elements are classified into four blocks, i.e., s-block, p-block, d-block and f-block depending on the type of atomic orbitals that are being filled with the last electron of the element. What is the position of the element in the periodic table satisfying the electronic configuration (n1)d^(1)ns^(2) for n=4 ?

    A
    3rd period and 3rd group
    B
    4th period and 4th group
    C
    3rd period and 2nd group
    D
    4th period and 3rd group

  • Elements with electronic configuration ns^1 are known as

    A
    Inert gases
    B
    Alkali metals
    C
    Transuranic elements
    D
    Halogons

  • Element in periodix table with electronic configuration as [Ar]^(18)3d^(5)4s^(1) is placed in:

    A
    IA,s-block
    B
    VIA,s-block
    C
    VIB,s-block
    D
    VIB,d-block

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