Select the correct answer. Which missing item would complete this alpha decay reaction? (}_{100)^257Fmarrow +_(2)^4He A. (}_{98)^253Cf B. (}_{96)^255Cm C. (}_{98)^253Fm D. (}_{90)^232Th E. (}_{92)^288U

## Step 1: Alpha decay is a type of radioactive decay where an atomic nucleus emits an alpha particle (consisting of 2 protons and 2 neutrons) and transforms into a new element. The general formula for alpha decay is:### where is the atomic number, is the mass number, is the parent nucleus, is the daughter nucleus, and is the alpha particle.## Step 2:In the given reaction, (Fermium) undergoes. According to the alpha decay formula, the daughter nucleus will have an atomic number 2 less than Fermium and a mass number 4 less than Fermium.## Step 3:Calculating the atomic number of the daughter nucleus:### ## Step 4:Calculating the mass number of the daughter nucleus:### ## Step 5:The element with atomic number 98 is Californium (Cf). Therefore, the missing item in the reaction is .