Which one of the following is an incorrect statement?a)The ionisation ...
The electron affinity of fluorine is unexpectedly less than that of Cl. Because the size of F atom is quite small, as a result, the electron-electron repulsions in the relatively compact 2p-subshell are comparitively large and hence the incoming electron is not accepted with the same ease as in the case with Cl.
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Which one of the following is an incorrect statement?a)The ionisation ...
Incorrect Statement: The electron affinity of fluorine is greater than that of chlorine.
Explanation:
• Ionisation potential or ionisation energy is the minimum energy required to remove an electron from a neutral gaseous atom or ion.
• Electron affinity is the energy released when an electron is added to a neutral gaseous atom to form a negative ion.
• Electronegativity is the ability of an atom to attract shared electrons towards itself in a covalent bond.
a) The ionisation potential of nitrogen is greater than that of oxygen.
• Nitrogen has a half-filled p subshell, which makes it more stable than oxygen.
• Therefore, more energy is required to remove an electron from the nitrogen atom than from the oxygen atom.
• Hence, the given statement is correct.
b) The electron affinity of fluorine is greater than that of chlorine.
• Electron affinity tends to increase as we move across a period from left to right.
• Fluorine is located to the right of chlorine in the periodic table and has a smaller atomic size.
• Therefore, it has a greater electron affinity than chlorine.
• Hence, the given statement is incorrect.
c) The ionisation potential of beryllium is greater than that of boron.
• Beryllium has a filled s subshell, which makes it more stable than boron.
• Therefore, more energy is required to remove an electron from the beryllium atom than from the boron atom.
• Hence, the given statement is correct.
d) The electronegativity of fluorine is greater than that of chlorine.
• Electronegativity tends to increase as we move across a period from left to right.
• Fluorine is located to the right of chlorine in the periodic table and has a smaller atomic size.
• Therefore, it has a greater electronegativity than chlorine.
• Hence, the given statement is correct.
Conclusion:
Hence, option (b) is the incorrect statement.
Which one of the following is an incorrect statement?a)The ionisation ...
Fluorine, which is higher up the group then chlorine, has a lower electron affinity. This is because the electrons in the outermost shell of a fluorine atom are closer together. ... Energy is required to keep the gained electron in the shell, causing fluorine to have a smaller electron affinity than chlorine
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