Question

Identify the element having the highest enthalpy of atomization from the following.

• A. Cu (Z=29)
• B. Fe (Z=26)
• C. Zn (Z=30)
• D. Sc (Z=21)

Hint:

The enthalpy of atomization is generally higher for elements with stronger metallic bonds, like iron, compared to others like copper and zinc.

Answer 1

The Correct Option is B

Step 1: Understanding enthalpy of atomization.
The enthalpy of atomization refers to the amount of energy required to break a bond in a molecule to form individual atoms in the gas phase. Iron (Fe) has the highest enthalpy of atomization among the given elements due to its metallic bonding and structure.

Step 2: Analyzing the options.
(A) Cu: Copper has a relatively low enthalpy of atomization compared to iron.
(B) Fe: Iron has the highest enthalpy of atomization among the listed elements due to its bonding.
(C) Zn: Zinc has a moderate enthalpy of atomization but is lower than iron.
(D) Sc: Scandium has a lower enthalpy of atomization compared to iron.

Step 3: Conclusion.
The correct answer is (B) Fe (Z=26) as it has the highest enthalpy of atomization.