Question
What is the smallest unit of matter?
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A. Write the name of the reaction.
B. Identify the electrophile in it.
C. How is this electrophile generated?
${ }_5^{10} B ,{ }_6^{12} C ,{ }_{13}^{27} Al ,{ }_6^{11} C ,{ }_{14}^{28} S$ :
| Symbol | Atomic Number(Z) | Atomic Mass Number(A) | Neutron Number, N =A-Z | % Abundance | Stability |
| ${ }_6^{12} \mathrm{C}$ or $\mathrm{C}-12$ | 12 | 98.9% | |||
| 6 | 7 | 1.1% | Stable | ||
| ${ }_6^{14} \mathrm{C}$ or $\mathrm{C}-14$ | 6 | 14 | <0.00017% | Radioactive |