The element having the smallest atomic radius among the following is
Correct answer: B. Ne
- A. Li
- B. Ne
- C. Rb
- D. Sr
Explanation
The correct answer is:b. NeAtomic radius generally decreases across a period (from left to right) in the periodic table and increases down a group (from top to bottom).In this case, Li (lithium), Rb (rubidium), and Sr (strontium) are in the same period (Period 2). Neon (Ne) is a noble gas and is also in Period 2.Among these elements, Ne has the smallest atomic radius. This is because, within a period, atomic size decreases from left to right due to increased effective nuclear charge pulling the electrons closer to the nucleus.So, option b is the correct answer as Ne has the smallest atomic radius among the given elements.
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