Question detail
What is the relative molecular mass of chlorine (Cl2)?
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. 35.5
- B. 71
- C. 70.9
- D. 36
Answer
71
Explanation
The relative molecular mass of chlorine gas (Cl2) is calculated as 2 x 35.5, which equals 71.
Common mistake
Relative Molecular Mass Confusion
Students often confuse the trend in relative molecular mass with the trend in atomic number down Group 7.
Focus on understanding that relative molecular mass increases due to the addition of more atoms and their respective masses, while atomic number relates to the number of protons.
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