Question

12 rank the following elements in order of increasing electronegativity. drag the choices so that the lowest electronegativity is on top of the list, and the greatest electronegativity is on the bottom of the list. sr co se

Explanation:

Step1: Recall electronegativity trends

Electronegativity increases across a period and decreases down a group in the periodic table.

Step2: Locate elements in periodic table

Sr (strontium) is in Group 2 and Period 5. Co (cobalt) is in Group 9 and Period 4. Se (selenium) is in Group 16 and Period 4.

Step3: Compare electronegativities

Sr is the most metallic among them, so it has the lowest electronegativity. Among Co and Se, Se is further to the right in the same period, so Se has a higher electronegativity than Co.

Answer:

Sr, Co, Se