QQuestionChemistry
QuestionChemistry
On average, how many neutrons does one atom of bromine have?
A. 35
B. 44.90
C. 45
D. 79.90
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Answer
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Step 1:Let's solve this step by step:
Step 2:: Identify the atomic information for bromine
- Bromine's atomic number is 35 - Bromine's atomic mass is approximately 79.90 u (unified atomic mass units)
Step 3:: Calculate the number of neutrons
- $$\text{Neutrons} = 44.90
- Number of neutrons = Atomic mass - Atomic number
Step 4:: Verify the calculation
- $$79.90 - 35 = 44.90
- Atomic number (number of protons) = 35 - Atomic mass = 79.90
Step 5:: Check the given options
- Option A: 35 (incorrect, this is the atomic number) - Option B: 44.90 (correct) - Option C: 45 (close, but not exact) - Option D: 79.90 (incorrect, this is the atomic mass)
Final Answer
B. 44.90 neutrons per atom of bromine.
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