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1. How many electrons in boron-11?
11 5 6 10 None of these

2. Convert 480. lbs. to SI.
Answer:

3. Which of these has a negligible mass?
Protons Neutrons Electrons Atoms None of these

4. 26.01/4.0
6.5 6.50 6.503 7 All of these

5. How many protons in sodium-23?
11 12 23 1 0

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