Question

Name one group on the periodic table that has very low reactivity. How many valence electrons are in the stable group?

Fluorine (F), a halogen, is very reactive. It often forms an ion with a 1– charge. How does this make it more stable?

Answer 1

A very stable group is 18, a group of inert gases that have the structure of s2p6 and 0 valence electrons. Fluorine has the structure s2p5, when it takes an electron, the structure goes to s2p6, which is very stable.