Balancing a decay equation There are two main rules to remember when balancing n

Question

Balancing a decay equation There are two main rules to remember when balancing nuclear equations: The total of the superscripts (mass numbers, ) in the reactants and products must be the same. The total of the subscripts (atomic numbers, ) in the reactants and products must be the same. Visual representation of an isotope where A represents the mass number, Z represents the atomic number, and X is the chemical symbol. Mass number (A) is equal to the sum of the number of protons and the number of neutrons in the nucleus. Atomic number (Z) is equal to the number of protons in the nucleus.

Part A

Identify the nuclide produced when uranium-238 decays by alpha emission:

238 92U42He + ?

Express your answer as an isotope using prescripts.

Part B

Identify the nuclide produced when thorium-234 decays by beta emission:

234 90Th  01e + ?

Express your answer as an isotope using prescripts.

Part C

Identify the nuclide produced when fluorine-18 decays by positron emission:

18 9F01e + ?

Express your answer as an isotope using prescripts.

Part D

Identify the nuclide produced when thallium-201 decays by electron capture:

201 81Tl+  01e00 + ?

Express your answer as an isotope using prescripts.

Part C

Identify the nuclide produced when fluorine-18 decays by positron emission:

18 9F01e + ?

Express your answer as an isotope using prescripts.

Part D

Identify the nuclide produced when thallium-201 decays by electron capture:

201 81Tl+  01e00 + ?

Express your answer as an isotope using prescripts.

Explanation / Answer

Part A

92U2382He4 + 90Th234

Part B

90Th234   -------> -1e0 + 91Pa234

Part-C

9F181+e0 + 8O18

Part-D

81Tl201+ -1 e000 +80 Hg201

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