Question detail
Which of the following statements is true about groups in the periodic table?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
The periodic table
Question
- A. Elements in the same group have different atomic numbers.
- B. Elements in the same group have the same number of outer-shell electrons.
- C. Groups are arranged in rows.
- D. Groups contain only metals.
Answer
Elements in the same group have the same number of outer-shell electrons.
Explanation
Elements in the same group share similar chemical properties due to having the same number of outer-shell electrons.
Common mistake
Misunderstanding Groups
Students often confuse groups with periods, thinking that both refer to the same arrangement in the periodic table.
Remember that groups are the vertical columns in the periodic table, while periods are the horizontal rows. Focus on the vertical arrangement when discussing groups.
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