Question

Look at Selenium (Se) and Oxygen (O) on the Periodic Table which one is larger? (1 point)

They are both the same size

Selenium (Se)

Oxygen (O)

Answer 1

Selenium (Se) is larger than Oxygen (O). In general, as you move down a group in the periodic table, the atomic size increases due to the addition of electron shells. Selenium is located below oxygen in the same group (Group 16), so it has a larger atomic radius.