Question
Give the complete symbol ${ }_{Z}^{A} \mathrm{X}$ for each of these atoms:(a) sodium with 12 neutrons,(b) argon with 21 neutrons, and (c) gallium with 38 neutrons.
Step 1
The mass number (A) is equal to the sum of the number of protons and neutrons. The symbol X represents the chemical symbol of the element. Show more…
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