What is common to all the four elements given: He, Ne, Ar, Kr?
Understand the Problem
The question is asking what common characteristic is shared by the elements Helium (He), Neon (Ne), Argon (Ar), and Krypton (Kr). It provides multiple-choice answers regarding their properties.
Answer
D. They all have positive value of electron gain enthalpy.
The final answer is D. They all have positive value of electron gain enthalpy, i.e., electron addition to them is an endothermic process.
Answer for screen readers
The final answer is D. They all have positive value of electron gain enthalpy, i.e., electron addition to them is an endothermic process.
More Information
Noble gases are unreactive due to their complete valence electron shells. Gaining additional electrons is not favorable, making electron gain enthalpy positive.
Tips
A common mistake is confusing reactivity with ionization energy. Noble gases have high ionization energy due to their full valence shells.
Sources
- Noble Gas | Britannica - britannica.com
- What do the elements on the far right of the table (He, Ne, Ar, and Kr ... - socratic.org
- Noble Gases | CK-12 Foundation - flexbooks.ck12.org
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