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) Responses 18 - noble gases 18 - noble gases 2 - alkaline earth metals 2 - alkaline earth metals 1 - alkali metals 1 - alkali metals 17 - halogens

Answer 1

The element described has seven electrons in its outer shell, is a gas at room temperature, is fairly toxic, and is highly reactive. Elements with seven valence electrons are found in Group 17 of the periodic table, which consists of the halogens. Therefore, the correct response is:

17 - halogens.