1. When an element has a different number of neutrons, it is called a/an...
Anomaly Differentiated Mutated Isotope None of these

2. How many neutrons in carbon-13?
13 0 1 7 6

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

4. Which of these is a mixture?
Uranium Table Salt (NaCl) Iron Steel Water

5. Which of these has a neutral charge?
Protons Neutrons Electrons Quarks None of these

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