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NEET
Exam
NEET
Subject
Chemistry
Chapter
p Block Elements (Group 13 & 14)

NEET · Chemistry · p Block Elements (Group 13 & 14)

What causes the observed discontinuity in ionization enthalpy...

What causes the observed discontinuity in ionization enthalpy values between aluminum and gallium?

Options

  1. AThe presence of d-electrons with high screening effect
  2. BThe presence of f-electrons with high screening effect
  3. CThe inability of d-electrons to compensate for the increase in nuclear charge
  4. DThe inability of f-electrons to compensate for the decrease in nuclear charge

Correct answer

C. The inability of d-electrons to compensate for the increase in nuclear charge

Step-by-step solution

The observed discontinuity in ionization enthalpy values between aluminum and gallium is due to the inability of d-electrons, which have low screening effect, to compensate for the increase in nuclear charge.
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