Of the various types of matter that compose the interstellar medium, hydrogen, be it in atomic, molecular, or ionized form (e.g., protons) constitutes the vast majority of the material at over 90%. Helium forms about 9% and less than one tenth of a percent is heavier elements.
Hydrogen is the most abundant element in the interstellar medium, making up about 90% of its mass. Helium is the second most abundant element in the interstellar medium, with trace amounts of heavier elements such as carbon, oxygen, and others.
No,the second most abundant
Rock is the most abundant material in the crust.
The most abundant molecule in interstellar clouds besides molecular hydrogen is carbon monoxide (CO). It is frequently used by astronomers as a tracer for studying the presence of molecular clouds and star formation activities.
The Iron at the Earth's core is magnetic and is the most abundant, at the earth's crust, Lodestone is the most abundant naturally occurring magnetic material.
The two most abundant elements in nebulae are hydrogen and helium. These elements make up the majority of the mass in interstellar clouds and are the building blocks for the formation of stars and planets.
Carbon.
Hydrogen
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carbon
Most of the universe is made up of hydrogen gas, followed by helium. These two gases are the most abundant elements in the universe and can be found in stars, galaxies, and interstellar space.
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