Question

locate f, o, br, se on the periodic table. which would you expect to be the most reactive? f o se br

Explanation:

• Reactivity of non - metals increases across a period (from left to right) and decreases down a group.
• F (fluorine) is in group 17 (halogens), period 2.
• O (oxygen) is in group 16, period 2.
• Br (bromine) is in group 17, period 4.
• Se (selenium) is in group 16, period 4.
• Fluorine is the most electronegative element. It has a small atomic radius and a high effective nuclear charge, making it very reactive as it readily gains an electron to achieve a stable electron configuration.

Answer:

F