Question

A part of the periodic table is shown below:

A portion of the sixteenth and seventeenth columns of the periodic table is shown. Column 16 reads eight oxygen, 16 sulfur, and 34 selenium. Column 17 reads nine fluorine, 17 chlorine, and 35 bromine.

Which of the following elements is less reactive than the others?

Bromine (Br)
Oxygen (O)
Selenium (Se)
Sulfur (S)

Answer 1

I think it’s Selenium (Se)

Step-by-step explanation:

Chemical reactivity in non-metals increases going up the column, and going to the right on the rows. We’re looking for the less reactive, and the element towards the bottom left is Selenium (Se).

Hope it helps :/