Identify each of the following as alpha decay, beta decay, positron emission, or gamma emission:

a. ^27m₁₃Al → ²⁷₁₃Al + ⁰₀γ

Identify each of the following as alpha decay, beta decay, positron emission, or gamma emission:

a. ¹²⁷₅₅Cs → ¹²⁷₅₄Xe + ⁰₊₁e

Identify each of the following as alpha decay, beta decay, positron emission, or gamma emission:

b. ⁹⁰₃₈Sr → ⁹⁰₃₉Y + ⁰_–1e

Identify each of the following as alpha decay, beta decay, positron emission, or gamma emission:

c. ²¹⁸₈₅At → ²¹⁴₈₃Bi + ⁴₂He

Write the balanced nuclear equation for each of the following:

e. In-113m (γ emission)

Complete each of the following nuclear equations:

d. ^23m₁₂Mg → ? + ⁰₀γ

Write the balanced nuclear equation for each of the following:

a. When two oxygen-16 atoms collide, one of the products is an alpha particle.

Write the balanced nuclear equation for each of the following:

a. Polonium-210 decays to give lead-206.

What are the products in the fission of uranium-235 that make possible a nuclear chain reaction?

Where does fusion occur naturally?

All the elements beyond uranium, the transuranium elements, have been prepared by bombardment and are not naturally occurring elements. The first transuranium element neptunium, Np, was prepared by bombarding U-238 with neutrons to form a neptunium atom and a beta particle. Complete the following equation:

¹₀n + ²³⁸₉₂U →? + ?

The half-life for the radioactive decay of Ce-141 is 32.5 days. If a sample has an activity of 4.0 µCi after 130 days have elapsed, what was the initial activity, in microcuries, of the sample?