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Question
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
17 - halogens
17 - halogens
1 - alkali metals
1 - alkali metals
18 - noble gases
18 - noble gases
2 - alkaline earth metals
1 answer
The element described in the question has seven electrons in its outer shell, is a gas at room temperature, and is highly reactive. These characteristics correspond to the properties of the halogens, which belong to Group 17 of the periodic table.
Therefore, the correct response is:
17 - halogens
