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The most abundant element on Earth is oxygen, but the most abundant element in the entire universe is hydrogen. On Earth, oxygen makes up approximately 47 percent of the Earth's mass and is found both in Earth's atmosphe... More »

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The most abundant mineral group found in the Earth's crust is the silicate group. The silicate minerals contain both oxygen and silicon, which are also the two most abundant elements contained in the Earth's mantle. Sili... More »

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The most abundant element present in air is nitrogen, which comprises about 78.1 percent of the air on Earth. The second-most abundant element is oxygen, at about 20.9 percent of air's makeup. Together, the elements nitr... More »

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Some interesting hydrogen facts for kids include that it is the most common element found throughout the universe, where it is often found in stars and gas planets, such as Jupiter. Hydrogen is one of the two elements, a... More »

www.reference.com Science Chemistry Atoms & Molecules

The most abundant element in the universe is hydrogen. Approximately 75 percent of all matter is composed of hydrogen. As of 2015, 90 percent of the visible universe is comprised of hydrogen. More »

www.reference.com Science Chemistry Atoms & Molecules

Nitrogen is the fifth most abundant element in the universe, and makes up 78 percent of the Earth's atmosphere. Nitrogen is a gas at room temperature and has an atomic number of seven. Nitrogen has a wide number of pract... More »

www.reference.com Science Chemistry Atoms & Molecules

Phosphorous is a chemical element that exists on Earth as phosphate-containing minerals, typically bound to oxygen. Phosphorous does not exist on Earth as a free element. More »

www.reference.com Science Chemistry Atoms & Molecules