2. How many protons in sodium-23?
11 12 23 1 0
3. When an element has a different number of neutrons, it is called a/an...
Anomaly Differentiated Mutated Isotope None of these
4. How many electrons in boron-11?
11 5 6 10 None of these
5. Which of these has a neutral charge?
Protons Neutrons Electrons Quarks None of these
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