question arrange the elements in order of increasing atomic radius. use the periodic table to locate the…

question arrange the elements in order of increasing atomic radius. use the periodic table to locate the position of the elements in the table. drag each tile to the correct box. tiles barium calcium oxygen selenium sequence

question arrange the elements in order of increasing atomic radius. use the periodic table to locate the position of the elements in the table. drag each tile to the correct box. tiles barium calcium oxygen selenium sequence

Answer

Answer:

oxygen < selenium < calcium < barium

Explanation:

Step1: Recall atomic - radius trend

Atomic radius increases down a group and decreases across a period.

Step2: Locate elements in periodic table

Oxygen is in period 2, group 16. Selenium is in period 4, group 16. Calcium is in period 4, group 2. Barium is in period 6, group 2.

Step3: Compare radii

Since oxygen is in the second - period, it has the smallest radius among them. Selenium is in the same group as oxygen but lower, so it has a larger radius than oxygen. Calcium and selenium are in the same period, but calcium is in group 2 and selenium in group 16, so calcium has a larger radius than selenium. Barium is in the same group as calcium but lower, so barium has the largest radius.