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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.
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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?
The density is reduced to 50% (half) of its original value.
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.
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?
The density will be 50 % from the initial value.
What is the term given to the time it take for one half of a sample of radioactive nuclei to decay?
I believe that term would be 'half-life'
Which type of radioactive decay produces a helium atom?
Helium has two naturally occurring isotopes, 3He and 4He. Both are stable, so helium does not undergo decay in nature. Several synthetic isotopes exist. 5He is highly unstable and decays to 4He by emitting a neutron. 6He undergoes negative beta decay, producing 6Li. It has the longest half-life of any radioactive helium isotope, at 0.808 seconds. 7He is highly unstable and decays to 6He by emitting a neutron. 8He undergoes negative beta decay, followed immediately by emitting of a neutron, producing 7Li. Its half-life is 0.122 seconds. 9He is highly unstable and decays to 8He by emitting a neutron. 10He is highly unstable and decays to 9He by emitting a neutron.
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
Which element has 5 nucleons?
There is no stable isotope with 5 nucleons, i.e. 2 protons and 3 neutrons (helium 5). Helium 5 has the shortest half-life of any of the helium isotopes, shorter than helium 8, or helium 9, or helium 10! This presented a problem to physicists trying to explain formation of heavier elements in stars.
How do you draw an atom of helium?
You draw an atom cut in half and mark point A where the helium is.
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?
Much of Saturn's helium has differentiated towards its center.
Does Half life opposing force require Half life?
No. Half Life: Opposing Force does not require neither Half Life nor Half Life: Blue Shift.
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?
The density is reduced to 50% (half) of its original value.
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.
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?
The density will be 50 % from the initial value.
