Question

exam 2: periodicity & electron configuration/em spectrum
considering the elements: sulfur, chlorine, selenium and bromine, which has the greatest electronegativity?
selenium
sulfur
bromine
chlorine

Explanation:

Electronegativity increases across a period and decreases down a group in the periodic table. Sulfur and chlorine are in the same period with chlorine to the right, so chlorine is more electronegative than sulfur. Selenium and bromine are in the same period with bromine to the right, so bromine is more electronegative than selenium. Also, chlorine is above bromine in the halogen group. Since electronegativity decreases down a group, chlorine is more electronegative than bromine.

Answer:

D. Chlorine