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How does the amount of Hydrogen differ from that of helium in the Sun mass?
Wiki User
∙ 13y ago
The Sun is about 70% hydrogen, 28% helium, and 2% "other". When the Sun gets to about 50% hydrogen, the amount of helium present will seriously interfere with the hydrogen fusion, and the Sun will begin to collapse under its own gravity.
The Sun's core is currently around 15 million degrees Kelvin. As the Sun collapses, the increasing pressure will heat the Sun, and when it gets to about 45 million degrees, the Sun will begin fusing helium and with the new power source will expand into a red giant. We expect this to happen in about 4 billion years, perhaps a little more.
Wiki User
∙ 13y ago
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What is the main source of energy in star like sun?
Hydrogen fusion is the main energy source in any star.Put very simply, four Hydrogen atoms fuse to create Helium. The atomic weight of Helium is slightly less than four Hydrogen atoms the extra mass is released as energy.
What is the star Sirius a made of?
most stars are made of mainly hydrogen, a little helium and traces of other gases like oxygen
What is the heaviest element a star with a mass of 1 solar mass can fuse?
Helium.
What is the mass of the lowest-mass stars?
From Wikipedia: "For stars with similar metallicity to the Sun, the theoretical minimum mass the star can have, and still undergo fusion at the core, is estimated to be about 75 times the mass of Jupiter. When the metallicity is very low, however, a recent study of the faintest stars found that the minimum star size seems to be about 8.3% of the solar mass, or about 87 times the mass of Jupiter. Smaller bodies are called brown dwarfs, which occupy a poorly defined grey area between stars and gas giants." Comment 1: Metallicity refers to the percentage of elements heavier than helium (not "metals" in the chemical sense). Comment 2: Basically, a brown dwarf gets hot enough to fuse deuterium (hydrogen-2), but not regular hydrogen (hydrogen-1), which severely limits the amount of energy it can produce.
Is the thermonuclear fusion of hydrogen to form helium operating in the cores of low-mass stars on the main sequence?
I can't remember if it is the proton-proton chain or if it's the CNO cycle... i'm pretty sure it's the CNO cycle, but i'm not 100% sure.
How do the Jovian planet interiors differ?
All have cores of about the same mass, but differ in the amount of surrounding hydrogen and helium.
What has more mass hydrogen or helium?
Helium has more mass than hydrogen.
What fraction of the mass in the known universe is made up of hydrogen and helium?
By mass, hydrogen = 75%, helium = 23%.
Hydrogen plus hydrogen helium?
an isotope of hydrogen that has a mass of 2 rather then 1.09 fuses to make helium
Is the element with the least atomic mass hydrogen or is it helium?
The answer is Hydrogen.
What elements makes up most of the suns mass?
The main two are hydrogen and helium.
How are helium and hydrogen different?
Hydrogen and helium, both gasses, differ greatly in:the number of protons and electrons (1 or 2),the number of neutrons (0 or 2),their Atomic Mass 1.0 or 4.0 ,and not at least in their reactivity (highly explosive or inert).
Why hydrogen diffuses four times more than helium?
because the mass of hydrogen is less than that of helium
What two elements make up most of the sun's mass?
Hydrogen and helium.
Which elements have the smallest atomic mass?
Hydrogen and Helium
What causes energy to be released inside the sun?
A fusion of hydrogen atoms forms helium and formes a large amount of mass into energy.
What is the element with the least atomic mass is hydrogen or helium?
Hydrogen's atomic mass (1 amu for the most stable isotope) is less than that of helium (4 amu).
