Whether or not the process is observed in nature, which of the following could account for the transformation of phosphorus-28 to silicon-28? a. beta decay.
b. eletron capture
c. positron emission
d. alpha decay

positron emission

Explanation:

Positron emission,involves the decrease in the nuclear positive charge thus the atomic number of the daughter nucleus decreases by one unit compared to that of the parent nucleus while the mass number of the daughter nucleus remains the same as that of the parent nucleus.

Thus, when phosphorus-28 is transformed into to silicon-28, a positron emission has taken place because the mass number of the daughter nucleus remained the same while the atomic number of the daughter nucleus was decreased by one unit.

h let me think about that