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
1 - alkali metals
1 - alkali metals
17 - halogens
17 - halogens
2 - alkaline earth metals
17 - halogens
The element being described, with seven electrons in its outer shell, being toxic, a gas at room temperature, and highly reactive, belongs to Group 17 - Halogens on the periodic table.
To determine which group of the periodic table this element belongs to, we need to analyze its characteristics. The information provided states that the element has seven electrons in its outer shell, is toxic, is a gas at room temperature, and is highly reactive.
Based on these characteristics, we can conclude that the element belongs to Group 17, which is known as the halogens. The halogens have seven electrons in their outer shell, are highly reactive, and are typically found in a gaseous state at room temperature. Additionally, some halogens are toxic.
So, the correct answer is 17 - halogens.