A Matter of Degrees: How Does the Tilt of Earth's Axis Affect the Seasons?
You did not include the list but F is fluorine. The first halogen.
So, you can expect that the other members of the same group (halogens, column 17 of the periodic table) exhibit similar chemical behavior (reactivity).
So, I am sure your list contains one or more of theses elements: Cl (chlorine), Br (bromine), and I (iodine).
All of them you can expect to also be reactive non metal.
The answer is false. The correct answer would be efficiency.
Rust is the chemical product that results when iron reacts with oxygen.
