A scientist studies an element that has seven electrons in its outer shell, is fairly toxic, is a gas at room temperature, and is highly reactive. To which group of the periodic table does this element belong?(1 point)

Question

Responses

2 - alkaline earth metals
2 - alkaline earth metals

17 - halogens
17 - halogens

18 - noble gases
18 - noble gases

1 - alkali metals

Answer 1

The element described has seven electrons in its outer shell, which indicates it is likely a member of Group 17 of the periodic table, known as the halogens. Halogens are highly reactive nonmetals that exist as gases (such as fluorine and chlorine) at room temperature and are known to be toxic.

Therefore, the correct response is:

17 - halogens