2. When an element has a different number of neutrons, it is called a/an...
Anomaly Differentiated Mutated Isotope None of these
3. How many protons in sodium-23?
11 12 23 1 0
4. How many significant figures: 0.00580200
5. Which of these has a negligible mass?
Protons Neutrons Electrons Atoms None of these
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