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Which one of the following statements is incorrect:
- a)Greater is the nuclear charge, greater is the electron gain enthalpy
- b)Nitrogen has almost zero electron gain enthalpy
- c)Electron gain enthalpy decreases from fluorine to iodine in the group
- d)Chlorine has highest electron gain enthalpy
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
Which one of the following statements is incorrect:a)Greater is the nu...
The incorrect statement is:
Electron gain enthalpy decreases from fluorine to iodine in the group.
Explanation:
Electron gain enthalpy is the energy released when an electron is added to an isolated gaseous atom. In general, electron gain enthalpy becomes more negative (i.e., more energy is released) as we move across a period from left to right and up a group from bottom to top in the periodic table. This is due to the increasing effective nuclear charge and decreasing atomic size, which makes it easier for the atom to attract and hold an additional electron.
However, statement 3 is incorrect because electron gain enthalpy actually increases (becomes less negative or more positive) as we move down a group, such as from fluorine to iodine. This is because, as we move down a group, the atomic size increases and the effective nuclear charge experienced by the incoming electron decreases. This makes it less favorable for the atom to gain an electron, resulting in a less negative (or more positive) electron gain enthalpy.
Electron gain enthalpy decreases from fluorine to iodine in the group.
Explanation:
Electron gain enthalpy is the energy released when an electron is added to an isolated gaseous atom. In general, electron gain enthalpy becomes more negative (i.e., more energy is released) as we move across a period from left to right and up a group from bottom to top in the periodic table. This is due to the increasing effective nuclear charge and decreasing atomic size, which makes it easier for the atom to attract and hold an additional electron.
However, statement 3 is incorrect because electron gain enthalpy actually increases (becomes less negative or more positive) as we move down a group, such as from fluorine to iodine. This is because, as we move down a group, the atomic size increases and the effective nuclear charge experienced by the incoming electron decreases. This makes it less favorable for the atom to gain an electron, resulting in a less negative (or more positive) electron gain enthalpy.
Most Upvoted Answer
Which one of the following statements is incorrect:a)Greater is the nu...
Explanation:
Electron gain enthalpy is the energy released when an atom gains an electron to form an anion. It depends on several factors such as nuclear charge, atomic size, electronic configuration, and shielding effect.
a) Greater is the nuclear charge, greater is the electron gain enthalpy: This statement is correct. The nuclear charge of an atom determines the attraction between the nucleus and the incoming electron. As the nuclear charge increases, the attraction also increases, resulting in a higher electron gain enthalpy.
b) Nitrogen has almost zero electron gain enthalpy: This statement is partially correct. Nitrogen has a slightly positive electron gain enthalpy due to its stable half-filled p orbital configuration. However, the value is very small compared to other elements in the same period.
c) Electron gain enthalpy decreases from fluorine to iodine in the group: This statement is incorrect. The electron gain enthalpy generally increases from fluorine to chlorine and then decreases slightly from chlorine to iodine. This is due to the decreasing atomic size and increasing shielding effect that reduces the attraction between the nucleus and the incoming electron.
d) Chlorine has the highest electron gain enthalpy: This statement is correct. Chlorine has the highest electron gain enthalpy among all the elements in the periodic table due to its small atomic size, high nuclear charge, and electronic configuration.
In summary, option 'C' is incorrect because the electron gain enthalpy generally increases from fluorine to chlorine and then decreases slightly from chlorine to iodine.
Electron gain enthalpy is the energy released when an atom gains an electron to form an anion. It depends on several factors such as nuclear charge, atomic size, electronic configuration, and shielding effect.
a) Greater is the nuclear charge, greater is the electron gain enthalpy: This statement is correct. The nuclear charge of an atom determines the attraction between the nucleus and the incoming electron. As the nuclear charge increases, the attraction also increases, resulting in a higher electron gain enthalpy.
b) Nitrogen has almost zero electron gain enthalpy: This statement is partially correct. Nitrogen has a slightly positive electron gain enthalpy due to its stable half-filled p orbital configuration. However, the value is very small compared to other elements in the same period.
c) Electron gain enthalpy decreases from fluorine to iodine in the group: This statement is incorrect. The electron gain enthalpy generally increases from fluorine to chlorine and then decreases slightly from chlorine to iodine. This is due to the decreasing atomic size and increasing shielding effect that reduces the attraction between the nucleus and the incoming electron.
d) Chlorine has the highest electron gain enthalpy: This statement is correct. Chlorine has the highest electron gain enthalpy among all the elements in the periodic table due to its small atomic size, high nuclear charge, and electronic configuration.
In summary, option 'C' is incorrect because the electron gain enthalpy generally increases from fluorine to chlorine and then decreases slightly from chlorine to iodine.
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Community Answer
Which one of the following statements is incorrect:a)Greater is the nu...
Explanation:
Electron gain enthalpy refers to the energy change that occurs when an electron is added to a neutral atom to form a negative ion. The value of electron gain enthalpy depends on several factors such as nuclear charge, electron configuration, and atomic size.
a) Greater is the nuclear charge, greater is the electron gain enthalpy - This statement is correct as the greater the nuclear charge, the more strongly the nucleus attracts electrons, resulting in a higher electron gain enthalpy.
b) Nitrogen has almost zero electron gain enthalpy - This statement is also correct as nitrogen has a stable electronic configuration with a half-filled outermost shell. Therefore, it requires a considerable amount of energy to add an electron to form a negative ion, resulting in almost zero electron gain enthalpy.
c) Electron gain enthalpy decreases from fluorine to iodine in the group - This statement is incorrect as electron gain enthalpy generally increases from fluorine to iodine in the group due to the decreasing atomic size and increasing nuclear charge.
d) Chlorine has the highest electron gain enthalpy - This statement is also incorrect as the highest electron gain enthalpy is observed in the halogen group for fluorine due to its small atomic size and high nuclear charge.
Conclusion:
Hence, the incorrect statement is option 'C' as electron gain enthalpy generally increases from fluorine to iodine in the group.
Electron gain enthalpy refers to the energy change that occurs when an electron is added to a neutral atom to form a negative ion. The value of electron gain enthalpy depends on several factors such as nuclear charge, electron configuration, and atomic size.
a) Greater is the nuclear charge, greater is the electron gain enthalpy - This statement is correct as the greater the nuclear charge, the more strongly the nucleus attracts electrons, resulting in a higher electron gain enthalpy.
b) Nitrogen has almost zero electron gain enthalpy - This statement is also correct as nitrogen has a stable electronic configuration with a half-filled outermost shell. Therefore, it requires a considerable amount of energy to add an electron to form a negative ion, resulting in almost zero electron gain enthalpy.
c) Electron gain enthalpy decreases from fluorine to iodine in the group - This statement is incorrect as electron gain enthalpy generally increases from fluorine to iodine in the group due to the decreasing atomic size and increasing nuclear charge.
d) Chlorine has the highest electron gain enthalpy - This statement is also incorrect as the highest electron gain enthalpy is observed in the halogen group for fluorine due to its small atomic size and high nuclear charge.
Conclusion:
Hence, the incorrect statement is option 'C' as electron gain enthalpy generally increases from fluorine to iodine in the group.
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