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Which of the following statements is/are correct?
- a)The mass of neutron is slightly greater than that of proton
- b)C-D bond is shorter than C-H bond
- c)In H-atom, the electron revolves at a fixed distance of 0.53 Å.
- d)Angular momentum of all s-electrons is same.
Correct answer is option 'A,B,D'. Can you explain this answer?
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Which of the following statements is/are correct?a)The mass of neutron...
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Which of the following statements is/are correct?a)The mass of neutron...
A) The mass of a neutron is slightly greater than that of a proton.
This statement is correct. The mass of a neutron is approximately 1.008665 atomic mass units (u), while the mass of a proton is approximately 1.007276 u. Therefore, the mass of a neutron is slightly greater than that of a proton.
b) The C-D bond is shorter than the C-H bond.
This statement is correct. The bond length is the average distance between the nuclei of two bonded atoms. Carbon-hydrogen (C-H) bonds have a typical bond length of approximately 1.09 angstroms (Å), while carbon-deuterium (C-D) bonds have a typical bond length of approximately 1.08 Å. Therefore, the C-D bond is slightly shorter than the C-H bond.
c) In a hydrogen atom, the electron revolves at a fixed distance of 0.53 Å.
This statement is incorrect. According to the Bohr model of the hydrogen atom, the electron does not revolve around the nucleus in a circular orbit at a fixed distance. Instead, the electron occupies specific energy levels or orbitals, which are characterized by their average distance from the nucleus. The Bohr model suggests that the first energy level, known as the 1s orbital, has an average distance of approximately 0.53 Å from the nucleus. However, the electron's position within this orbital is described by a probability distribution rather than a fixed distance.
This statement is correct. The mass of a neutron is approximately 1.008665 atomic mass units (u), while the mass of a proton is approximately 1.007276 u. Therefore, the mass of a neutron is slightly greater than that of a proton.
b) The C-D bond is shorter than the C-H bond.
This statement is correct. The bond length is the average distance between the nuclei of two bonded atoms. Carbon-hydrogen (C-H) bonds have a typical bond length of approximately 1.09 angstroms (Å), while carbon-deuterium (C-D) bonds have a typical bond length of approximately 1.08 Å. Therefore, the C-D bond is slightly shorter than the C-H bond.
c) In a hydrogen atom, the electron revolves at a fixed distance of 0.53 Å.
This statement is incorrect. According to the Bohr model of the hydrogen atom, the electron does not revolve around the nucleus in a circular orbit at a fixed distance. Instead, the electron occupies specific energy levels or orbitals, which are characterized by their average distance from the nucleus. The Bohr model suggests that the first energy level, known as the 1s orbital, has an average distance of approximately 0.53 Å from the nucleus. However, the electron's position within this orbital is described by a probability distribution rather than a fixed distance.
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Which of the following statements is/are correct?a)The mass of neutron is slightly greater than that of protonb)C-D bond is shorter than C-H bondc)In H-atom, the electron revolves at a fixed distance of 0.53 Å.d)Angular momentum of all s-electrons is same.Correct answer is option 'A,B,D'. Can you explain this answer?
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