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Comprehension given below is followed by...

Comprehension given below is followed by some multiple choice questions. Each question has one correct option. Choose the correct option.
In the modern periodic table, elements are arranged in order of increasing atomic numbers which is related to the electronic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz s, p, d and f.
The modern periodic table consists of 7 periods and 18 groups. Each, period begins with the filling of a new energy shell. In accordance with the Aufbau principle, the seven periods (1 to 7) have 2, 8, 8, 18, 18, 32 and 32 elements respectively.
The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthonoids and actinoids are placed at the bottom of the main body of the periodic table
(iv) The electronic configuration of the element which is just above the element with atomic number 43 in th same group is ...........

A

`1s^(2) 2s^(2) 2p^(6) 3s^(2) 3d^(5) 4s^(2)`

B

`1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(5) 4s^(3) 4p^(6)`

C

`1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(6) 4s^(2)`

D

`1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(7) 4s^(2)`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the electronic configuration of the element just above the element with atomic number 43 in the same group, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Element with Atomic Number 43**: - The element with atomic number 43 is Technetium (Tc). 2. **Determine the Period of Technetium**: - Technetium (Tc) is located in the 5th period of the periodic table. 3. **Find the Group of Technetium**: - Technetium is a transition metal and is located in Group 7 of the periodic table. 4. **Identify the Element Above Technetium**: - The element directly above Technetium in the same group (Group 7) is Manganese (Mn), which has an atomic number of 25. 5. **Determine the Electronic Configuration of Manganese**: - The electronic configuration of Manganese (Mn) can be derived as follows: - The atomic number of Manganese is 25. - The electronic configuration can be written as: - 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s² - This can be simplified using the noble gas shorthand notation: - [Ar] 3d⁵ 4s² 6. **Conclusion**: - Therefore, the electronic configuration of the element just above the element with atomic number 43 (Technetium) in the same group is **[Ar] 3d⁵ 4s²**.
To solve the question regarding the electronic configuration of the element just above the element with atomic number 43 in the same group, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Element with Atomic Number 43**: - The element with atomic number 43 is Technetium (Tc). 2. **Determine the Period of Technetium**: ...
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