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
1 - alkali metals
1 - alkali metals
17 - halogens
17 - halogens
18 - noble gases
18 - noble gases
2 - alkaline earth metals
The correct answer is:
17 - halogens