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Question
part e. complete the following table: assume all atoms are neutral. isotope symbol nuclear symbol mass number number of protons number of neutrons number of electrons atomic number carbon - 12 ⁴⁰₁₈ar iodine - 128 ⁶⁰₂₈ni 34 16 21 19 14 13
Step1: Recall atomic - related concepts
For a neutral atom, the number of protons = the number of electrons = atomic number, and mass number = number of protons+number of neutrons.
Step2: Analyze carbon - 12
The atomic symbol of carbon is C. Its atomic number is 6. For carbon - 12 (mass number = 12), number of protons = 6, number of electrons = 6, number of neutrons=12 - 6 = 6. Nuclear symbol is $^{12}_{6}C$.
Step3: Analyze $^{40}_{18}Ar$
Isotope symbol is argon - 40. Mass number = 40, atomic number = 18, number of protons = 18, number of electrons = 18, number of neutrons=40 - 18 = 22.
Step4: Analyze iodine - 128
The atomic symbol of iodine is I, atomic number = 53. For iodine - 128 (mass number = 128), number of protons = 53, number of electrons = 53, number of neutrons=128 - 53 = 75. Nuclear symbol is $^{128}_{53}I$.
Step5: Analyze $^{60}_{28}Ni$
Isotope symbol is nickel - 60. Mass number = 60, atomic number = 28, number of protons = 28, number of electrons = 28, number of neutrons=60 - 28 = 32.
Step6: Analyze the atom with 34 mass number and 16 neutrons
Number of protons=34 - 16 = 18, number of electrons = 18, atomic number = 18. The element is argon, nuclear symbol is $^{34}_{18}Ar$.
Step7: Analyze the atom with 21 electrons and 19 atomic number
Since number of protons = number of electrons for a neutral atom, number of protons = 21, mass number=21 + 19=40. The element with atomic number 21 is scandium (Sc), nuclear symbol is $^{40}_{21}Sc$.
Step8: Analyze the atom with 14 neutrons and 13 electrons
Number of protons = 13, atomic number = 13, mass number=13 + 14 = 27. The element is aluminum (Al), nuclear symbol is $^{27}_{13}Al$.
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| isotope symbol | nuclear symbol | mass number | number of protons | number of neutrons | number of electrons | atomic number |
|---|---|---|---|---|---|---|
| argon - 40 | $^{40}_{18}Ar$ | 40 | 18 | 22 | 18 | 18 |
| iodine - 128 | $^{128}_{53}I$ | 128 | 53 | 75 | 53 | 53 |
| nickel - 60 | $^{60}_{28}Ni$ | 60 | 28 | 32 | 28 | 28 |
| argon - 34 | $^{34}_{18}Ar$ | 34 | 18 | 16 | 18 | 18 |
| scandium - 40 | $^{40}_{21}Sc$ | 40 | 21 | 19 | 21 | 21 |
| aluminum - 27 | $^{27}_{13}Al$ | 27 | 13 | 14 | 13 | 13 |