Question detail
Calculate the relative atomic mass of sulfur (S) given that it has 16 protons and 16 neutrons (A-level cue 8361370f focus)
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Amount of substance
Question
- A. 32
- B. 30 (A-level cue 8361370f distractor 1)
- C. 34 (A-level cue 8361370f distractor 2)
- D. 28 (A-level cue 8361370f distractor 3)
Answer
32
Explanation
The correct option is 32. 32 is correct because it supports the objective: Define relative atomic mass in relation to carbon-12.. The reasoning stays within Relative atomic mass and relative molecular mass and avoids drifting into a similar A-Level Chemistry idea. This version is uniquely anchored to Relative atomic mass and relative molecular mass. Retrieval anchor: A-level cue 8361370f.
Common mistake
Confusing Relative Atomic Mass with Mass Number
Students often confuse relative atomic mass (Ar) with mass number, thinking they are the same concept.
Remember that relative atomic mass is the weighted average mass of an atom compared to carbon-12, while mass number is the total number of protons and neutrons in an atom. To define relative atomic mass in relation to carbon-12, use the formula: Ar = (mass of atom / mass of carbon-12) x 12. For example, if the mass of an atom is 24, then Ar = (24 / 12) x 12 = 24. Therefore, the relative atomic mass is 24.
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