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NEETChemistryClassification of Elements and Periodicity in Properties

The first ionisation enthalpy (∆ i H) values of third-period elements, Na, Mg and Si are respectively 496, 737 and 786 kJ mol –1 . Which of the following is the correct statement regarding the first ∆ i H value for Al?

Options

  1. ALower than ∆ i H value of Magnesium
  2. BHigher than ∆ i H value of Silicone
  3. CSame as ∆ i H value of Sodium
  4. DCannot be discussed without further information

Correct answer

A. Lower than ∆ i H value of Magnesium

Step-by-step solution

Correct Option is : (A) Lower than ∆ i H value of Magnesium

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