Table of Contents

- 1 What are the elements with the longest and shortest half-life?
- 2 Which of these has the longest half-life?
- 3 What is the shortest life of an element?
- 4 What element decays the fastest?
- 5 What radioactive isotope has the shortest half-life?
- 6 Which element has half-life of only 8 seconds?
- 7 What is the most radioactive element?
- 8 What is the half life of a radioactive element?

## What are the elements with the longest and shortest half-life?

This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days, and years….10−24 seconds (yoctoseconds)

isotope | half-life 10−24 seconds |
---|---|

hydrogen-6 | 290 |

lithium-5 | 304 |

boron-7 | 350 |

fluorine-14 | 500 |

**What element has shortest Halflife?**

Hydrogen-7 ( about 23x10E-24) has the shortest half life.

### Which of these has the longest half-life?

The half-life of xenon-124 — that is, the average time required for a group of xenon-124 atoms to diminish by half — is about 18 sextillion years (1.8 x 10^22 years), roughly 1 trillion times the current age of the universe. This marks the single longest half-life ever directly measured in a lab, Wittweg added.

**Which element has a half-life of only a few minutes?**

Francium is a chemical element with the symbol Fr and atomic number 87. Prior to its discovery, it was referred to as eka-caesium. It is extremely radioactive; its most stable isotope, francium-223 (originally called actinium K after the natural decay chain it appears in), has a half-life of only 22 minutes.

## What is the shortest life of an element?

Out of the options given above, lead-214 is the element with the shortest half-life. Lead-214 has a half-life of 27 minutes, in which time it produces…

**What is considered a short half-life?**

Examples of drugs with a short half-life It has a short half-life of around 30 minutes. LSD (lysergic acid): An illegal hallucinogenic drug, LSD only remains in blood plasma for 2-4 hours, NHTSA reports, but a “trip” may last 6-8 hours or even longer in some cases.

### What element decays the fastest?

Bismuth-209 (209Bi) is the isotope of bismuth with the longest known half-life of any radioisotope that undergoes α-decay (alpha decay)….Bismuth-209.

General | |
---|---|

Half-life | 2.01×1019 years |

Parent isotopes | 209Pb (β−) 209Po (β+) 213At (α) |

Decay products | 205Tl |

Isotope mass | 208.9803987 u |

**What has a half-life?**

half-life, in radioactivity, the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay (change spontaneously into other nuclear species by emitting particles and energy), or, equivalently, the time interval required for the number of disintegrations per second of a radioactive …

## What radioactive isotope has the shortest half-life?

Uranium-234 has the shortest half-life of them all at 245,500 years, but it occurs only indirectly from the decay of U-238. In comparison, the most radioactive element is polonium.

**Do protons have a half-life?**

Despite significant experimental effort, proton decay has never been observed. If it does decay via a positron, the proton’s half-life is constrained to be at least 1.67×1034 years. Therefore, protons will not decay into other particles on their own, because they are the lightest (and therefore least energetic) baryon.

### Which element has half-life of only 8 seconds?

Meitnerium’s most stable isotope, meitnerium-278, has a half-life of about 8 seconds. It decays into bohrium-274 through alpha decay.

**What is a long half-life?**

Drugs that have a long half-life include The high may last only a few hours; however, residual effects can linger for up to 24 hours.

## What is the most radioactive element?

Because it is a naturally-occurring element that releases a huge amount of energy, many sources cite polonium as the most radioactive element. Polonium is so radioactive it glows blue, which is caused by excitation of the gas particles by radiation.

**What is the half life of an element?**

Half Lives. The half-life of a radioactive element is the time that it takes for one half of the atoms of that substance to disintegrate into another nuclear form. These can range from mere fractions of a second, to many billions of years.

### What is the half life of a radioactive element?

It has been found that the estimate of decay of every radioactive element is according to the graph but the half-life of every radioactive element is different. For example the half-life of uranium-238 is 4.5 ×10 9 years while the half of radium-226 is 1620 years.

**What is the longest half life?**

In the case of valium, the longest half-life is 200 hours. So full strength is achieved after 200hours X 5 = 1000hours = 41.66 days.