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1. It lasts for as long as the universe in theory, as it does not decay into any other element unless it's in a star, where it will undergo fusion into "heavier" elements
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2. In a balloon, it easily diffuses through the balloon skin and "leaks" away into the atmosphere, so maybe a day or so.
3. In the atmosphere, it gradually diffuses out into space, but is replenished by natural generation.
What else can I help you with?
Will a balloon half filled with air other half helium float?
Yes, a balloon that is half-filled with air and the other half with helium will float because helium is lighter than air. The helium will cause the overall density of the balloon to be lower than the surrounding air, resulting in it floating.
The time it takes for half of the radioactive element to decay is the element's what?
The time it takes for half the atoms in a sample of a radioactive element to decay is called the half life.
What is the term given to the time it take for one half of a sample of radioactive nuclei to decay?
The term is called half-life. It is the time it takes for half of the radioactive nuclei in a sample to decay.
When a helium balloon rises in the air it expands If the volume of the balloon doubles what happens to the density of the helium inside it?
If the volume of the balloon doubles while the mass of helium remains the same, the density of helium inside the balloon would decrease by half. Density is calculated as mass divided by volume, so if volume doubles and mass stays the same, the density will decrease.
What does Pu-239 has a half-life of?
Pu-239 has a half-life of 24,110 years.
What is the half life of helium?
Helium-3 is stable.
Would a balloon float longer if it had 100 percent helium or half helium and half oxygen?
100% helium
What is the half life of the Radioisotope H3?
The half-life of the radioisotope tritium (H-3) is about 12.32 years. This means that it takes approximately 12.32 years for half of a sample of tritium to decay into helium-3.
Will a balloon half filled with air other half helium float?
Yes, a balloon that is half-filled with air and the other half with helium will float because helium is lighter than air. The helium will cause the overall density of the balloon to be lower than the surrounding air, resulting in it floating.
Is hydrogen lighter than helium?
No, helium is almost 4 times as heavy as hydrogen.
What is the range of half-lives of different radioactive element?
It would be quite difficult to list all radioactive elements and their half lives in this area. Lithium 5 has a half life of about a trillionth of a second. Uranium 238 has a half life of about 4.7 billion years. Since the world is about 4.2 billion years, over half the Uranium 238 is still around. The first element in the Periodic Table, Hydrogen, has a radioactive form, Hydrogen 3. It has a half life of about Twelve and a half years. Helium has a radioactive form, Helium 5. It's half life is a trillionth of a second. Then you get to elements with different radioactive isotopes. You will need to look them up in a handbook. Tin is the element with the most isotopes.
Why does the atmosphere of Saturn appear to have only half the helium content of Jupiter?
Saturn's atmosphere appears to have half the helium content of Jupiter because Saturn has a lower overall density than Jupiter, leading to a greater proportion of hydrogen compared to helium in its atmosphere. Jupiter's higher density means that there is more helium present in its atmosphere compared to Saturn.
Does Half life opposing force require Half life?
No. Half Life: Opposing Force does not require neither Half Life nor Half Life: Blue Shift.
What does one half cubic foot equal in pounds?
That depends on what this is a half-cubic foot OF. Feathers? Lead? Helium? It makes a difference.
The time it takes for half of the radioactive element to decay is the element's what?
The time it takes for half the atoms in a sample of a radioactive element to decay is called the half life.
Is half life opposing force on Playstation 2?
No, only Half-Life and Half-Life: Decay.
What is the half life of antibiotics?
Antibiotics do not have a half life.
