The question
Name: ______________________ Date: ____________ Sulfur, chlorine and their ions (4 points)
Data table
Sulfur and chlorine
Data for two neighboring elements in period 3.
| Element | Protons | Atomic radius (pm) | First ionization energy (kJ/mol) | Common ion |
|---|---|---|---|---|
| S | 16 | 103 | 1000 | S²⁻ |
| Cl | 17 | 99 | 1251 | Cl⁻ |
(a) Write the complete electron configuration of the sulfide ion, S²⁻. [1 point]
(b) S²⁻ and Cl⁻ have the same number of electrons. Identify the larger ion and justify your answer in terms of Coulombic attraction. [1 point]
(c) Write the formula of the ionic compound formed between aluminum and sulfur. [1 point]
(d) Using the data, explain why the first ionization energy of Cl is greater than that of S. [1 point]