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Chapter 3: Problem 45

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

Short Answer

Expert verified
Answer: The atomic number of the element is 37.

Step by step solution

01

Determine the number of electrons for each l value

We are given the following information: - 9 electrons with l=0 - 18 electrons with l=1 - 10 electrons with l=2
02

Calculate the total number of electrons

Now that we know how many electrons correspond to each l value, we can calculate the atomic number by summing up these electron counts: Total number of electrons = Electrons with l=0 + electrons with l=1 + electrons with l=2 Total number of electrons = 9 + 18 + 10 = 37
03

Select the correct alternative

As we have calculated the total number of electrons (atomic number) to be 37, the correct alternative is (a). Therefore, the atomic number of the element is 37.

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Most popular questions from this chapter

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) \(3,4,2,1\)

Direction for questions: State whether the following statements are true or false. Pairing of electrons in degenerate orbitals takes place only when the degenerate orbitals are filled with one electron each.

For each of the questions, four choices have been provided. Select the correct alternative. (1) The probability of finding an electron is maximum at certain places in space. (2) Energy change takes place only during excitation or deexcitation of electrons. (3) Electron has both particle and wave nature. (4) Angular momentum of the electrons revolving in different elliptical orbits is quantized. Arrange the above statements of different models or principles in the chronological order, which ultimately led to the development of modern structure of the atom. (a) \(1,2,3,4\) (b) \(2,4,3,1\) (c) \(4,3,2,1\) (d) \(2,3,1,4\)

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Direction for questions: State whether the following statements are true or false. In iron, the differentiating electron enters into the orbital of a penultimate shell.
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