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P-Block Elements Trends: Electron Gain Enthalpy Video Lecture | Chemistry Class 11 - NEET

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FAQs on P-Block Elements Trends: Electron Gain Enthalpy Video Lecture - Chemistry Class 11 - NEET

1. What is electron gain enthalpy?
Ans. Electron gain enthalpy refers to the energy change that occurs when an atom or ion gains an electron to form a negative ion. It is a measure of the ability of an atom to accept an additional electron.
2. What factors affect the electron gain enthalpy of p-block elements?
Ans. The electron gain enthalpy of p-block elements is influenced by factors such as atomic size, nuclear charge, electron shielding, and electron-electron repulsion. Larger atoms with higher nuclear charge tend to have more negative electron gain enthalpies.
3. How does the electron gain enthalpy vary across a period?
Ans. In general, the electron gain enthalpy increases across a period from left to right. This is because the atomic size decreases while the nuclear charge increases, leading to a stronger attraction for incoming electrons.
4. What is the trend of electron gain enthalpy down a group?
Ans. The electron gain enthalpy generally decreases down a group. This is because the atomic size increases, resulting in weaker attraction between the nucleus and incoming electrons.
5. Can the electron gain enthalpy of an element be positive?
Ans. Yes, the electron gain enthalpy of an element can be positive. This occurs when the addition of an electron results in the formation of a less stable or less favorable electron configuration. In such cases, the atom may not readily accept an additional electron.
195 videos|337 docs|190 tests
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