Question

12 multiple choice 1 point find the product created when copper - 62 undergoes alpha decay. cobalt - 58 cobalt - 60 nickel - 58 nickel - 60 13 multiple choice 1 point find the product created when sodium - 22 undergoes beta decay. magnesium - 22 sodium - 21 aluminum - 22 sodium - 22 14 multiple choice 1 point find the product created when sulfur - 35 undergoes beta decay. phosphorus - 33 sulfur - 34 chlorine - 35 argon - 38 15 multiple choice 1 point calculate the amount of energy released by the nuclear reaction of 65 kilograms of uranium 1.95x10^10 j 5.85x10^18 j 3.90x10^10 j 1.38x10^15 j

Explanation:

Step1: Recall alpha - decay rule

In alpha - decay, mass number decreases by 4 and atomic number by 2. Copper - 62 (Cu, atomic number 29) becomes nickel - 58 (Ni, atomic number 28).

Step2: Recall beta - decay rule

In beta - decay, a neutron becomes a proton, mass number stays the same, atomic number increases by 1. Sodium - 22 (Na, atomic number 11) becomes magnesium - 22 (Mg, atomic number 12), sulfur - 35 (S, atomic number 16) becomes chlorine - 35 (Cl, atomic number 17).

Step3: Use E = mc² for energy

For 65 kg of uranium, using $E = mc^{2}$ with $c = 3\times10^{8}$ m/s, $E=65\times(3\times 10^{8})^{2}=5.85\times 10^{18}$ J.

Answer:

1. nickel - 58
2. magnesium - 22
3. chlorine - 35
4. $5.85\times 10^{18}$ J