2. Compare the value for ionization energy for the following pairs of elements. Justify your answer.
a. Li and B b. Mg and Ca
3. Which of the following has the largest atomic radius and which has the smallest? Explain. a.- carbon b. silicon C. germanium
4. Sort the following elements by decreasing electronegativity: sulfur, oxygen, neon, aluminum.
5. Define electronegativity.​



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