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A helium flash occurs because the core of the star is in what is known as a "degenerate" state. This means that the core has contracted so much that the pressure of the electron shells of the atoms making up the core prevent the core from contracting further. Under normal gas conditions (i.e. NOT a degenerate state), an increase in the temperature of the core would cause an increase in core pressure resulting in the core expanding and the temperature then dropping. This state is known as hydrostatic equilibrium. With a degenerate core, the temperature increases but the pressure doesn't. This extra energy ignites the helium creating run-away nuclear reactions. This is what is referred to as a "helium flash."
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What element is colorless gas and used in balloons?
'Helium' because it is also an INERT (Noble) gas. Hydrogen could be used to make the balloon float/rise, but hydrogen is a flammable gas. On explosion you will have a flash of flame.
What are the symbols for hydrogen and helium?
The chemical symbol for helium is "He."
What is the simble for helium?
The symbol of Helium is He. Helium's atomic number is 2.
Is helium paramagnetic?
AnswerThere are two variants of helium -- helium 3 and helium 4. Helium 4 is not magnetic but helium 3 is. Its magnetism is, however, of different nature than e.g. that of iron. The magnetism of helium 3 is used for medical lung imaging.
Is helium a metal or a nonmetal?
Helium is a nonmetal. Think about the helium balloon!
The helium flash converts helium nuclei into?
carbon
How long does Helium Flash in Stars Solar Masses last?
The helium flash only last for a couple of minutes.
Why will a helium flash never occur in some stars?
Some stars do not develop degenerate helium cores.
What happens after a helium flash?
The luminosity of a low mass star goes down after helium flash. The sudden onset of helium fusion stops core shrinkage and the low-mass star will become smaller, and less luminous than it was as a red giant.
What element is colorless gas and used in balloons?
'Helium' because it is also an INERT (Noble) gas. Hydrogen could be used to make the balloon float/rise, but hydrogen is a flammable gas. On explosion you will have a flash of flame.
Why can't a lower-mass star generate energy through carbon flash?
A low-mass star never gets hot enough in the core to fuse helium into carbon.
Is hydrogen inert gas?
Far from it!!! When mixed with oxygen it readily ignites , Remember the 'pop' test in the lab. for testing for hydrogen. However, the next element on the peridoci table , which is helium (He) is the most inert elememnt of all. The classic demonstration in the lab. is to have two balloons. one filled with hydrogen and one filled with helium. Put a lighted(burning) taper to the hydrogen balloon and it will explode, with a flame flash Put a lighted(burning) taper to the helium balloon and it will explode but no flame flash.
What is the element name for He?
Helium Helium
The helium flash occurs at what stage in stellar evolution?
As a G-type star fuses its hydrogen to helium, this helium will gather in the core. As a result, the core will contract under its own weight as hydrogen is being spent. The contraction causes an increased hydrogen fusion rate, increasing the temperature. When insufficient hydrogen remains in the core, the layers above are no longer supported by the outward pressure of radiation, and collapse on top of the core, causing it to contract further, and also initiating hydrogen fusion outside the core. At this point, the star leaves the main sequence, and becomes a red giant. At this stage, the core of the giant may reach critical density for helium fusion to initiate. Since the core is composed of mostly degenerate matter at this stage, there is no regulation of the fusion rate. Also, degenerate matter is less opaque to the energies produced than non-degenerate matter, so conducts them better.Ehr, to summarize: the helium flash occurs during the red giant stage of G-type stars.
What is helium made from?
Do you mean helium? Helium is an element, so it's made of .... helium!
Is the difference between helium in a jar in helium?
helium in a jar diff from helium atom
What element has 2 protons 1 neutron and 2 electrons?
Helium has 2 protons, 2 neutrons and 2 electrons. The symbol for helium is He and the atomic number is 2.
