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Sodium and sulfur react together to form sodium sulfide, Na2S - CIE - A-Level Chemistry - Question 12 - 2019 - Paper 1
Question 12
Sodium and sulfur react together to form sodium sulfide, Na2S. How do the atomic radius and ionic radius of sodium compare with those of sulfur? A atomic radius io... show full transcript
Worked Solution & Example Answer:Sodium and sulfur react together to form sodium sulfide, Na2S - CIE - A-Level Chemistry - Question 12 - 2019 - Paper 1
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ionic radius
Answer
For the ionic radius, sodium forms a cation (Na⁺), which has a smaller radius than its atomic radius due to the loss of an electron. In contrast, sulfur forms an anion (S²⁻), which has a larger radius than its atomic radius because of the addition of electrons. Therefore, compare the ionic radii: sodium is less than sulfur.