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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता ११ वी

Indicate the number of unpaired electrons in Si (Z = 14).

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प्रश्न

Indicate the number of unpaired electrons in \[\ce{Si}\] (Z = 14).

लघु उत्तर
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उत्तर

Electronic configuration of \[\ce{Si}\] (Z = 14) is 1s2 2s2 2p6 3s2 3p2

Orbital diagram:

↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓  
1s 2s 2p 3s 3p

Number of unpaired electrons = 2

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पाठ 4: Structure of Atom - Exercises [पृष्ठ ५४]

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बालभारती Chemistry [English] Standard 11 Maharashtra State Board
पाठ 4 Structure of Atom
Exercises | Q 6. (S)(a) | पृष्ठ ५४

संबंधित प्रश्‍न

Using s, p, d notations, describe the orbital with the following quantum numbers n = 1, l = 0.


Using s, p, d notations, describe the orbital with the following quantum numbers n = 4; l = 2.


Using s, p, d notations, describe the orbital with the following quantum numbers n = 4; l =3.


Choose the correct option.

“No two electrons in the same atoms can have identical set of four quantum numbers”. This statement is known as -


Define the term Electronic configuration.


State the order of filling atomic orbitals following Aufbau principle.


Write orbital notations for the electron in orbitals with the following quantum numbers.

n = 2, l = 1


Write condensed orbital notation of electronic configuration of the following element:

Carbon (Z = 6)


Write condensed orbital notation of electronic configuration of the following element:

Oxygen (Z = 8)


Write condensed orbital notation of electronic configuration of the following element:

Silicon (Z = 14)


Write condensed orbital notation of electronic configuration of the following element:

Calcium (Z = 20)


The electronic configuration of oxygen is written as 1s2 2s2 \[\ce{2p^2_{{x}}}\] \[\ce{2p^1_{{y}}}\] \[\ce{2p^1_{{z}}}\] and not as 1s2 2s2 \[\ce{2p^2_{{x}}}\], \[\ce{2p^2_{{y}}}\] \[\ce{2p^0_{{z}}}\], Explain.


How many electrons in 19K have n = 3, l = 1?


How many electrons can fit in the orbital for which n = 4 and l = 2?


Which one of the following is NOT possible?


Which of the following properties of atom could be explained correctly by Thomson Model of atom?


Orbital angular momentum depends on ______.


Which of the following sets of quantum numbers are correct?

  `n` `l` `m_l`
(i) 1 1 +2
(ii) 2 1 +1
(iii) 3 2 –2
(iv) 3 4 –2

The arrangement of orbitals on the basis of energy is based upon their (n + l) value. Lower the value of (n + l), lower is the energy. For orbitals having same values of (n + l), the orbital with lower value of n will have lower energy.

Based upon the above information, arrange the following orbitals in the increasing order of energy.

5p, 4d, 5d, 4f, 6s


The arrangement of orbitals on the basis of energy is based upon their (n + l) value. Lower the value of (n + l), lower is the energy. For orbitals having same values of (n + l), the orbital with lower value of n will have lower energy.

Based upon the above information, arrange the following orbitals in the increasing order of energy.

5f, 6d, 7s, 7p


The arrangement of orbitals on the basis of energy is based upon their (n + l) value. Lower the value of (n + l), lower is the energy. For orbitals having same values of (n + l), the orbital with lower value of n will have lower energy.

Based upon the above information, solve the questions given below:

Which of the following orbitals has the lowest energy?

4d, 4f, 5s, 5p


What is the difference between the terms orbit and orbital?


Which of the following is the correct plot for the probability density ψ2 (r) as a function of distance 'r' of the electron from the nucleus for 2s orbitals?


Which one of the following laws will represent the pairing of electrons in a subshell after each orbital is filled with one electron?


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