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1. How many significant figures: 26.2 + 100.
Answer:

2. How many significant figures: 0.00580200
Answer:

3. What is the SI unit for mass?

4. Which of these can an element have a different number of?
Protons Neutrons Electrons All of these None of these

5. Which of these is not an element?
Uranium Plutonium Iron Gold Brass

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