When the first ionisation energies are plotted against atomic number, the peaks are occupied by
Show Hint
- Alkali metals
- Rare gases
- Halogens
- Transition elements
The Correct Option is B
Solution and Explanation
Step 1: Understand the periodic trend.
Ionization energy increases across a period and decreases down a group. The highest ionization energies are found in the noble gases.
Step 2: Conclusion.
The peaks in the graph correspond to the noble gases, which have the highest first ionization energies. Final Answer: \[ \boxed{\text{Rare gases}} \]
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