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CBSE - Class 11 > Chemistry > Structure of Atom Worksheets

Free CBSE - Class 11 Chemistry - Structure of Atom worksheets

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1.
Among the following pairs of orbitals which orbital will experience the larger effective nuclear charge? (i) 2s and 3s,
2.
Among the following pairs of orbitals which orbital will experience the larger effective nuclear charge? (ii) 4d and 4f,
3.
Among the following pairs of orbitals which orbital will experience the larger effective nuclear charge? (iii) 3d and 3p.
4.
The unpaired electrons in Al and Si are present in 3p orbital. Which electrons will experience more effective nuclear charge from the nucleus ?
5.
Indicate the number of unpaired electrons in : (a) P, (b) Si, (c) Cr, (d) Fe and (e) Kr.
6.
How many subshells are associated with (n = 4) ?
7.
How many electrons will be present in the subshells having (m_s) value of (–\frac{1}{2}) for (n = 4) ?
8.
If the position of the electron is measured within an accuracy of + 0.002 nm, calculate the uncertainty in the momentum of the electron. Suppose the momentum of the electron is (\frac{h}{4\pi m} \times 0.05) nm, is there any problem in defining this value.
9.
The quantum numbers of six electrons are given below. Arrange them in order of increasing energies. If any of these combination(s) has/have the same energy lists:
1. (n = 4, l = 2, m_l = –2 , m_s = –\frac{1}{2})
2. (n = 3, l = 2, m_l = 1 , m_s = +\frac{1}{2})
3. (n = 4, l = 1, m_l = 0 , m_s = +\frac{1}{2})
4. (n = 3, l = 2, m_l = –2 , m_s = –\frac{1}{2})
5. (n = 3, l = 1, m_l = –1 , m_s = +\frac{1}{2})
6. (n = 4, l = 1, m_l = 0 , m_s = +\frac{1}{2})
10.
The bromine atom possesses 35 electrons. It contains 6 electrons in 2p orbital, 6 electrons in 3p orbital and 5 electron in 4p orbital. Which of these electron experiences the lowest effective nuclear charge ?
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Chapters in CBSE - Class 11 Chemistry

Chemical Bonding and Molecular Structure Worksheet Classification of Elements and Periodicity in Properties Worksheet Equilibrium Worksheet Hydrocarbons Worksheet Organic Chemistry – Some Basic Principles and Techniques Worksheet Redox Reactions Worksheet Some Basic Concepts of Chemistry Worksheet Thermodynamics Worksheet

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