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The first ionisation enthalpies of Na, M...

The first ionisation enthalpies of Na, Mg , Al and Si are the order

A

Na lt Mg gt Al lt Si

B

Na gt Mg gt Al gt Si

C

Na lt Mg lt Al gt Si

D

Na gt Mg gt Al lt Si

Text Solution

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The correct Answer is:
A
Ionisation energy increases from left to right in a period. However exception occurs in cases where ionisation would disrupt the stable half-filled or fully filled subshells. Ionisation energy of group 2 > Ionisation energy of group 13
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VMC MODULES ENGLISH-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -JEE ADVANCE (ARCHIVE)
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  3. The first ionisation enthalpies of Na, Mg , Al and Si are the order

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  4. Which of the following statements is/are true for the long form of the...

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  6. Which one of the following is the smallest in size?

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  17. Assertion: F atom has less negative electron gain enthaply than Cl ato...

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  19. Statement I : The first ionisation energy of Be is greater than that o...

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