Question

1. choose the best answer.

what does inert mean?
unstable
stable
reactive
nonreactive

1. choose the best answer.

why are halogens the most reactive nonmetal group?
they have 7 electrons.
they have 7 valence electrons.
they have 8 electrons.
they have 8 valence electrons.

Explanation:

1. In chemistry, "inert" means not reactive. "Unstable" and "reactive" are the opposite of inert. "Stable" is a more general term, while "nonreactive" directly matches the meaning of inert.
2. Reactivity of non - metals is related to valence electrons. Halogens have 7 valence electrons. Having 7 valence electrons makes them eager to gain one more electron to achieve a full outer shell (8 electrons), which is why they are reactive. Just having 7 electrons (not specifying valence) is not as accurate, and having 8 (valence) electrons would make them inert.

Answer:

1. nonreactive
2. They have 7 valence electrons.