Question detail
Predict the physical state and color of potassium at room temperature based on its position in Group 1 of the periodic table.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
The periodic table
Question
Predict the physical state and color of potassium at room temperature based on its position in Group 1 of the periodic table.
Answer
Potassium is a solid at room temperature and has a silvery appearance. It is a metal that is soft and can be cut with a knife.
Explanation
This answer is strong as it accurately describes the physical state and appearance of potassium, linking it to its classification as a Group 1 metal. The question assesses the student's ability to predict properties based on group trends.
Common mistake
Misunderstanding Reactivity Trends
Students often think that all Group 1 elements react with water in the same way, without considering their increasing reactivity down the group.
Emphasize the trend that reactivity increases down Group 1, leading to more vigorous reactions with water for elements like potassium compared to lithium.
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