# What is the decay of uranium?

## What is the decay of uranium?

The half-life of uranium-238 is 4.5 billion years (opens in new tab). It decays into radium-226, which in turn decays into radon-222. Radon-222 becomes polonium-210, which finally decays into a stable nuclide, lead.

What is the nuclear decay equation for uranium-235?

In such an equation, the number of nucleons (protons + neutrons) is conserved, e.g. 235 + 1 = 141 + 92 + 3, but a small loss in atomic mass may be shown to be equivalent to the energy released.

### What is the decay constant for uranium-235?

9.72×10-10 yr-1
&lambda1 is the uranium(235) decay constant — 9.72×10-10 yr-1, and &lambda2 is the uranium(238) constant — 1.54 x 10-10 yr-1. K is the ratio of uranium(238) to uranium(235) which was about 137.8 when Patterson first published his results.

What is the beta decay of uranium-238?

Uranium-238 decays by alpha emission into thorium-234, which itself decays by beta emission to protactinium-234, which decays by beta emission to uranium-234, and so on. The various decay products, (sometimes referred to as “progeny” or “daughters”) form a series starting at uranium-238.

#### What does U-238 decay into?

The nuclear disintegration of uranium-238 forms radium-226 which disintegrates to form radon gas (radon-222). Radon decays to form a series of daughter nuclides, most of which are alpha-particle-releasing isotopes, such as polonium-210.

What is the half-life of uranium-238 *?

The half-life of uranium-238 is about 4.5 billion years, uranium-235 about 700 million years, and uranium-234 about 25 thousand years.

## What is the half-life of uranium-234?

The half-life of uranium-238 is about 4.5 billion years, uranium-235 about 700 million years, and uranium-234 about 250 thousand years.

What is the half-life of uranium 233?

After that time the nuclide decays through electron emission to protactinium-233, whose half-life is 26.967 days.

### How long does uranium take to decay?

Uranium is a radioactive material with two primary isotopes, U235 and U238. These isotopes decay at a constant rate that has a half-life (i.e., time for the activity to reduce by half) greater than 100 million years.

What is the half-life of uranium 232?

69-year
U-232 decays with a 69-year half-life through 1.9-year half-life Th-228 to Tl-208, which emits a 2.6 MeV gamma ray upon decay.

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