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Chapter 3: Problem 17
For each of the questions, four choices have been provided. Select the correct alternative. Among the following, the orbital that has the lowest energy is (a) \(5 \mathrm{f}\) (b) \(4 \mathrm{f}\) (c) \(6 \mathrm{~s}\) (d) \(6 \mathrm{p}\)
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For each of the questions, four choices have been provided. Select the correct alternative. The difference between the angular momentum of two orbits of \(\mathrm{He}^{+2}\) is \(\frac{2 \mathrm{~h}}{\pi} .\) The energy of an electron present in the higher orbit is \(-1.51 \mathrm{eV}\). Identify the lower orbit. (a) 1 (b) 2 (c) 3 (d) 4
For each of the questions, four choices have been provided. Select the correct alternative. In the following pairs, identify the pair having a different \((\mathrm{n}+\ell)\) value: (a) \(4 \mathrm{~s}, 3 \mathrm{p}\) (b) \(3 \mathrm{~d}, 4 \mathrm{p}\) (c) 4s, \(3 \mathrm{~d}\) (d) \(4 \mathrm{~d}, 5 \mathrm{p}\)
For each of the questions, four choices have been provided. Select the correct alternative. The statements given below are the postulates of various atomic models. Arrange them in their chronological order. (1) Fine structure is due to the presence of subshells in the main energy level. (2) The size of an atom is much larger than the size of its nucleus. (3) As long as the electron is present in a particular orbit, its energy remains constant. (4) Negatively charged particles are uniformly spread in the lump of positive charge. (a) \(4,3,2,1\) (b) \(2,3,4,1\) (c) \(4,2,3,1\) (d) \(3,4,2,1\)
For each of the questions, four choices have been provided. Select the correct alternative. The number of nodes of an s-orbital increases with (a) the increase in \(\mathrm{n}\) value (b) the decrease in \(\mathrm{n}\) value (c) the increase in 1 value (d) the decrease in 1 value
For each of the questions, four choices have been provided. Select the correct alternative. An atom of an element has 9 electrons with \(1=0\) value, 18 electrons with \(\mathrm{l}=1\) value and 10 electrons with \(1=2\) value. Calculate the atomic number of the element. (a) 37 (b) 41 (c) 38 (d) 39
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