Table of Contents

- 1 What is the half-life of a radioisotope If a 50g sample becomes 25g after 18 days?
- 2 What is the half-life of a radioisotope if a 40 g sample becomes 10 g after 20 minutes?
- 3 What eventually happens to all radioactive isotopes?
- 4 What does the half-life of a radioactive substance indicate answers com?
- 5 What is the half life of tritium isotope?
- 6 What is the half life of fluorine 20?

## What is the half-life of a radioisotope If a 50g sample becomes 25g after 18 days?

What is the half life of a radioisotope If a 50g sample becomes 25g after 18 days? Answer: 18 DAYS IS THE HALF LIFE OF THE RADIOISOTOPE.

### What is the half-life of a radioisotope if a 40 g sample becomes 10 g after 20 minutes?

What is the half-life of a radioisotope if a 40 g sample becomes 10 g after 20 minutes? 10 minutes.

**What information does the half-life of a radioisotope give?**

The radioactive decay process for each radioisotope is unique and is measured with a time period called a half-life. One half-life is the time it takes for half of the unstable atoms to undergo radioactive decay.

**What is the definition of a radioisotope apex?**

radioisotope. An unstable isotope that undergoes nuclear decay.

## What eventually happens to all radioactive isotopes?

Eventually all unstable nuclides will decay to a stable nuclide, this can take multiple steps and millions of years.

### What does the half-life of a radioactive substance indicate answers com?

The half-life of a radioactive substance is a characteristic constant. It measures the time it takes for a given amount of the substance to become reduced by half as a consequence of decay, and therefore, the emission of radiation.

**What are radioisotope give two example?**

Radioactive isotopes of radium, thorium, and uranium, for example, are found naturally in rocks and soil. Uranium and thorium also occur in trace amounts in water. Other radioactive isotopes are produced by humans via nuclear reactions, which result in unstable combinations of neutrons and protons.

**How is the half life of a radioactive isotope constant?**

The half-life of a specific radioactive isotope is constant; it is unaffected by conditions and is independent of the initial amount of that isotope. Consider the following example. Suppose we have 100.0 g of tritium (a radioactive isotope of hydrogen). It has a half-life of 12.3 y.

## What is the half life of tritium isotope?

Suppose we have 100.0 g of tritium (a radioactive isotope of hydrogen). It has a half-life of 12.3 y. After 12.3 y, half of the sample will have decayed from hydrogen-3 to helium-3 by emitting a beta particle, so that only 50.0 g of the original tritium remains.

### What is the half life of fluorine 20?

The half-life of fluorine-20 is 11.0 s. If a sample initially contains 5.00 g of fluorine-20, how much remains after 44.0 s? If we compare the time that has passed to the isotope’s half-life, we note that 44.0 s is exactly 4 half-lives, so using the previous expression, n = 4.

**What is the half life of niobium-94?**

How long does it take for 2.00 g of niobium-94 to decay to 0.0625 g if its half-life is 20,000 y? It took 75 y for 10.0 g of a radioactive isotope to decay to 1.25 g. What is the half-life of this isotope?