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Nearly the entire mass of an atom is comprised by its nucleus. The hydrogen atom is no exception. The mass of a typical hydrogen atom (known as protium, P) is 1amu, which tells you that it consists of 1 proton. Of course, there's also 1 electron, but this electron's mass doesn't come into play (an electron's mass is about 0.0005amu).
On the Periodic Table, the Atomic Mass of hydrogen comes in at about 1.00794. This is a result of the small of percentage of all hydrogen out there that consists of more massive isotopes. H-2 (deuterium, D) has 1 neutron; H-3 (tritium, T) has 2 neutrons. The 1.00794 is a weighted average of these relative abundances.
Another viewpoint:
I think the answer is simpler than that. The question may simply be about the fact that the measured mass includes an electron, but the nuclear mass does not. It depends a bit on how you interpret this question.
Anyway, the proton has about 1836 times the mass of an electron.
So, the mass of a hydrogen atom is almost the same as the mass of the nucleus, as mentioned above.
Incidentally, the definition of atomic mass (which is slightly different from "nuclear mass") is not quite as straightforward as some people may think.
The atomic mass of "protium" is, in fact, not 1 amu, but about 1.00782 amu.
So, for the atomic mass of hydrogen, the mass of the electron is actually slightly more important than the effect of the small amounts of heavy isotopes.
You may want to click on the link below for more details on the atomic mass of hydrogen.
(Strictly speaking I think you should call that the "relative atomic mass" when talking about all the isotopes together in a sample, but that's a bit pedantic here.)
The Wikipedia page "Isotopes of hydrogen" is useful too.
Also, there's a link below to a "related question".
Add your answer:
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How is matter quantified?
Matter is quantified using the concept of mass. Mass is a measure of the amount of matter in an object and is typically measured in units such as kilograms or grams. The mass of an object can be determined by using a balance or a scale to compare it to a standard mass.
How do you identify mass?
Mass is a measurement of the amount of matter in an object. It can be identified by using a balance scale to compare the object's mass to a known mass standard. The unit of mass is typically measured in grams or kilograms.
What can be used to compare the objects of mass?
Objects can be compared based on their mass using a balance scale, a spring scale, or by measuring their weight using a tool like a digital scale. The units for mass are typically measured in grams or kilograms.
What would stars be like if hydrogen rather than iron had the lowest mass per nuclear particle?
If hydrogen had the lowest mass per nuclear particle, stars would be much less massive since they are primarily made up of hydrogen. This would result in shorter and less energetic lifespans for stars, leading to different evolutionary paths and outcomes in the universe. Additionally, the fusion processes within stars would be different, impacting the production of elements and the overall chemical composition of the universe.
What is a hydrogen envelope?
A hydrogen envelope refers to the outer layer of a star that primarily consists of hydrogen gas. It is the region where nuclear fusion reactions occur, converting hydrogen into helium and releasing energy in the form of light and heat. The size and properties of the hydrogen envelope can vary depending on the age and mass of the star.
How does the measured mass of hydrogen compare with its nuclear mass due to one proton?
The mass of the whole hydrogen atom includes the mass of an electron as well as the proton. The proton mass is nearly 2000 (actually about 1836) times greater than the electron mass. So, the mass of the hydrogen atom isn't much different from the mass of the proton. It's also possible this question could be about isotopes. Hydrogen has rare isotopes with one or two neutrons in the nucleus. So, the average mass of hydrogen, as measured, is usually a bit more than you would expect from just a proton and electron. However, these other isotopes are very rare and the effect on the mass of a sample of hydrogen would be very small.
What is the element with the most mass per nucleon?
The element with the most mass per nucleon is lead (atomic number 82). Lead has a high atomic mass, but a relatively low number of protons and neutrons compared to its overall mass, resulting in a high mass per nucleon value.
What is a nuclear furnace?
The sun is a mass, Of incandescent gas, A gigantic nuclear furnace, Where hydrogen is built Into Helium, At a temperature of millions of degrees.
What is mass defect associated with?
Mass defect is associated with nuclear reactions and nuclear binding energy. It refers to the difference between the measured mass of an atomic nucleus and the sum of the masses of its individual protons and neutrons. This difference is released as energy when the nucleus is formed.
What energy transformation occurs in nuclear fusion of hydrogen?
In nuclear fusion of hydrogen, the transformation of mass into energy occurs. This is in accordance with Einstein's equation E=mc^2, where a small amount of mass is converted into a large amount of energy.
In a nuclear fusion reaction how does the mass of the products compare to the mass of the reactants.?
In a nuclear fusion reaction, the mass of the products is slightly less than the mass of the reactants. This loss of mass is converted into energy according to Einstein's E=mc^2 equation. The difference in mass is known as the mass defect.
What does nuclear fusion give the sun?
The sun fuses hydrogen into helium. The mass of the resulting helium is not the same as the original hydrogen. The difference is energy.
What percent of the sun is hydrogen?
About 74% of the Sun's mass is hydrogen. This element is essential for nuclear fusion reactions that power the Sun, converting hydrogen into helium and releasing energy in the process.
What element makes up about 75 percent of the sun's mass?
Hydrogen makes up about 75% of the sun's mass. It is the primary fuel source for the sun's nuclear fusion reactions that produce energy.
What is a hydrogen isotope with a mass of 3?
The hydrogen isotope with a mass of 3 is tritium. It consists of one proton and two neutrons, making it heavier than the more common hydrogen isotopes deuterium (mass 2) and protium (mass 1). Tritium is radioactive and is often used in nuclear reactions and research.
70 percent of sun's mass consists of?
Hydrogen, specifically hydrogen nuclei undergoing nuclear fusion to form helium. This process releases energy in the form of heat and light, which powers the Sun and allows it to emit sunlight.
What Makes up 75 percent of the sun's mass?
Hydrogen makes up about 75% of the Sun's mass. This hydrogen is converted into helium through nuclear fusion in the Sun's core, releasing enormous amounts of energy in the process.
