a scientist studies an element that has seven electrons and 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? Would it be halogens, medals, alkaline earth, nettles, or noble gases?

Answer 1

Based on your description, the element you are referring to has seven electrons. This indicates that it has seven valence electrons, which is characteristic of the halogens. Halogens are found in Group 17 of the periodic table, and they often exist as gases at room temperature (e.g., fluorine and chlorine), are highly reactive, and can be toxic. Therefore, the element belongs to the halogens group.