Which one of the following is not correct:
Correct answer: D. The most abundant rare gas found in atmosphere is He
- A. Xe is the most reactive among rare gasses
- B. He is an inert gas
- C. Randon is obtained from decay of radium
- D. The most abundant rare gas found in atmosphere is He
Explanation
The most abundant rare gas found in the atmosphere is Argon not Helium.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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