Which best includes elements with the most similar chemical properties?
(1) br, ca, hg (3) o, s, se(2) cr, pb, xe (4) n, o , f

Usually, elements with more similar properties share the same column on the periodic table.
Therefore, if you look at the periodic table, you can see that Oxygen, Sulfur, and Selenium all share the same column. Therefore, they all have similar properties

#3 ( O, S, Se )

Hope this helped!!! :D

true

Explanation:

Hotter things have more heat energy than colder things. That's because the atoms or molecules move around faster in hot things (red, right) than they do in cold things (blue, left). ... The more heat you supply, the faster the molecules move and the further apart they get.