What percent of the solar nebula mass consist of hydrogen and helium gases?

Approximately 74% of the solar nebula’s mass consisted of hydrogen and helium gases. This was calculated by analyzing the composition of the protospheric disk around the Sun. The elements with the highest percentages were hydrogen (71.

3%) and helium (2. 55%). The remaining 26% of the solar nebula’s mass was composed of heavier elements such as oxygen, nitrogen, carbon, and iron. These elements were likely present as molecules, ions, and dust grains, which were created in the earlier stages of the Solar System’s formation.

By looking at the composition of the disk, astronomers can understand the formation of the Solar System and how it evolved over time. In addition, knowing the percentages of hydrogen and helium that make up the solar nebula can help us better understand the composition of other planets, stars, and galaxies in the Universe.

Which ingredients made up 98% of the solar nebula?

The Solar Nebula was composed of 98% hydrogen (H), helium (He), and a trace amount of heavier elements like oxygen (O), carbon (C), and sulfur (S). These more complex molecules were mainly found in the form of ices, oxidized rocks, and metallic dust particles which were embedded in the gas.

Hydrogen and helium were more diffuse, enabling them to form a more expansive cloud-like structure that accounted for the majority of the nebula. The trace amount of heavier elements would then form pockets or regions of higher concentrations, eventually leading to the development of protoplanetary systems.

Since planets need heavier elements to form, their presence in the nebula was essential; however, the nebula is believed to have mainly consisted of 98% light elements such as hydrogen and helium.

What is the composition of most solar nebula?

Most solar nebulae are composed of a variety of gases and dust particles. The most common gas components are hydrogen and helium, which can account for up to 98% of all interstellar gas in a nebula. Other gas components, such as carbon, nitrogen, and oxygen, make up the remaining 2%.

The dust particles within a nebula are typically composed of heavier elements such as carbon, oxygen, silicon, sulfur, and magnesium. These particles are typically around 0. 1 to 0. 01 micrometers in size and are thought to be the seeds for the formation of planets.

The abundance of different elements and the ratio of different elements to one another are thought to be important to the formation of stars and planets.

What makes up 99.9% of the mass of the solar system?

The vast majority (99. 9%) of the mass of the solar system is made up of the Sun. The Sun makes up approximately 99. 86% of the total mass of the solar system and contains more than 99. 8% of the total number of atoms found within the boundaries of the solar system.

The remaining 0. 14% of the mass of the solar system is made up of planets, asteroids, comets, dust, gas, and other debris. The four largest planets (Jupiter, Saturn, Uranus, and Neptune) make up most of the remaining mass, accounting for just under 0.

15% of the total mass of the solar system. The four innermost planets (Mercury, Venus, Earth, and Mars) account for approximately 0. 03% of this total mass. The remaining minor planets, comets, and other small objects make up the remaining 0.

01%.

Is the universe 75% hydrogen and 25% helium?

No, the universe is not 75% hydrogen and 25% helium. Current estimates suggest that roughly 74% of all matter in the universe is composed of hydrogen and 24% is composed of helium, with the remaining 2% consisting of other elements such as oxygen, carbon and neon.

Furthermore, the ratio of hydrogen to helium is not actually fixed and changes depending on the region in the universe that is being observed. For instance, in the Milky Way galaxy, the ratio is 76. 1% hydrogen and 23.

8% helium.

Are stars made up of 71% helium and 27% hydrogen?

No, the composition of stars can vary greatly. In our own Solar System, the Sun is made up mostly of hydrogen (around 70%) and helium (around 28%). Other stars can have much different compositions. For example, red dwarf stars have a higher proportion of helium (55%-70%) compared to hydrogen (25%-45%).

Wolf-Rayet stars, which are very rare and massive, have the opposite composition – they are composed primarily of hydrogen (50%-80%) and helium (15%-45%). Therefore, it is not accurate to say that stars are made up of a consistent amount of helium and hydrogen.

Which gas is about 75% of Sun made up of?

The Sun is predominantly composed of hydrogen, which comprises about 75% of its mass. Hydrogen is the most abundant element in the universe, making up around 74% of the total normal matter in the cosmos.

In stars like the Sun, the hydrogen is transformed into helium through nuclear fusion, release energy in the process. Hydrogen is also the simplest of all elements, consisting of only one proton and one electron.

What is the percentage of hydrogen and helium?

The exact percentage of hydrogen and helium in the universe is not easily determined due to the vastness and complexity of outer space. In general, hydrogen makes up about 74% of all atoms in the universe, while helium plays a slightly smaller role making up 24%.

Other elements, such as oxygen, carbon, and nitrogen, make up only a tiny fraction (less than 1%). In terms of mass, hydrogen and helium combine for about 98% of the total mass of the universe, with the remaining 2% made up of the other elements.

Where does about 99% of all matter contained in the solar nebula exist?

The majority of matter contained in the solar nebula exists in the form of gas and dust particles. The gas is primarily composed of hydrogen and helium and is distributed throughout the entire nebula.

The dust particles, on the other hand, are composed of much denser elements, such as carbon, oxygen, and iron. These dust particles mainly exist closer to the center of the nebula, where the density is greatest.

In addition to the gas and dust particles, the solar nebula also contains much smaller amounts of heavier elements, such as uranium and gold. These heavier elements can be found in the small, dense pockets of matter located within the nebula, which are known as planetesimals.

However, by and large, these heavy elements are much less prevalent, making up only tiny fraction of the matter contained within the nebula—an estimated 0. 1% compared to the gas and dust particles, which make up around 99%.

Which of the following 16 bodies contain over 99% of the solar system known mass?

The four heaviest bodies in the solar system that contain over 99% of all the known mass in the solar system are the Sun, Jupiter, Saturn, and the combined mass of all the other planets. The Sun is by far the most massive object in the solar system, containing over 99.

8% of the total mass. This is followed by Jupiter, with over 318 times the mass of Earth and 2. 5 times all the other planets combined. Saturn is the third most massive, with 95 times the mass of Earth and 1.

5 times the mass of all other planets combined. Finally, the combined mass of all the planets in the solar system—Mercury, Venus, Earth, Mars, Neptune, Uranus, and Pluto—contains about 0. 2% of all the known mass in the solar system, totaling just over 4.

3 times the mass of Earth.

What two elements together comprise 99% of the Sun?

The two elements that together make up 99% of the Sun are hydrogen and helium. Hydrogen makes up around 73. 46% of the Sun’s mass, while helium comprises roughly 24. 85%. These two elements are the most plentiful in the universe, and they are the primary components of stars.

Other elements, such as oxygen, carbon and iron, make up the remaining 0. 14% of the Sun’s mass. These elements are important in that they are the primary components of molecules and other organic materials that exist in the universe.

What percentage do the elements hydrogen and helium account for in the universe quizlet?

Hydrogen and helium account for approximately 74% of the total elemental composition of the universe. Hydrogen makes up about 71%, while helium makes up about 3%. These two elements were some of the very first to form within the universe shortly after the Big Bang.

Hydrogen is the most abundant element, as well as being the simplest, lightest, and most reactive element. Helium is the second most abundant element, being much heavier and less reactive than hydrogen.

What is the ratio of the universe’s helium to hydrogen by mass?

The ratio of helium to hydrogen in the universe by mass is approximately 7. 18%:26. 08%, respectively. Helium has always been the second most abundant element in the universe, right after hydrogen, but estimates of the abundance of the two elements in the universe have seen some variation.

Part of this is because the amount of helium produced in stars varies with the type of stars, the age of the stars, and the compositions of the stars. Generally, for most cases, helium makes up about 24% of all baryonic mass, with hydrogen taking up the rest.

Therefore, the ratio of helium to hydrogen by mass works out to about 7. 18%:26. 08%.

Where is most of the hydrogen and helium in the solar system found?

Most of the hydrogen and helium in the solar system can be found in the Sun. The Sun is composed mostly of hydrogen (about 75 percent) and helium (about 24 percent) and is the primary source of these two elements in the solar system.

The remaining 1 percent of the Sun’s composition is composed of heavier elements like carbon, nitrogen, oxygen, and silicon. Hydrogen and helium can also be found in minor amounts in other astronomical objects such as planets, moons, comets, asteroids, and interstellar gas clouds.

In the inner regions of the solar system, there is very little hydrogen and helium, while in the outer regions they can be quite abundant. The planets like Jupiter and Saturn that are composed mostly of gas contain the most hydrogen and helium among all the objects in the solar system.

Therefore, the majority of the hydrogen and helium in the solar system is primarily found in the Sun.

What element makes 90% of the universe?

The vast majority of the universe is made up of what are known as “baryonic” or “ordinary” matter, which consists primarily of mundane atoms such as hydrogen and helium. It is estimated that baryonic matter accounts for up to 90% of all matter present in the universe.

This includes stars, gas, nebulae, planets, and all other forms of matter that are typically visible to human eyes. All of this has been calculated based on observations made with particle accelerator, gamma ray, and infrared telescopes that measure the energy density of the universe.

Baryonic matter also consists of elements such as lithium, carbon, nitrogen, oxygen, iron, and magnesium. These atoms are the essential building blocks of planets and stars and are responsible for most of the mass of the universe.

It is thought that the remaining 10%, deemed “dark matter”, is mostly composed of particles that do not interact with light in the same way baryonic matter does and is therefore more difficult to detect and study.

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