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As far as we know, Americium is a wholly man-made element. It was first produced in 1944 and was the fourth trans-Uranic element to be discovered. So, apart from the debris from bomb explosions, and remnant rubbish from smoke detectors, its presence in the Earth's crust is zero.
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What makes close to 95 percent of the rocks of earths crust?
Silicates make up close to 95 percent of the rocks in the Earth's crust
What two elements make up more than 80 percent of the atoms found in the earths crust?
Oxygen and silicon make up more than 80 percent of the atoms found in the Earth's crust. Oxygen is the most abundant element in the Earth's crust, comprising about 46.6% of the crust by weight, while silicon is the second most abundant at around 27.7%.
What other more practical uses can quartz crystal have?
Quartz make up about 30 percent of earths continental crust...
What are the rocks that make up the earths crust?
the crust and the core
What percent of Earths crust do silicates make up?
Silicates make up about 90% of Earth's crust. These minerals are composed of silicon and oxygen, along with other elements like aluminum, iron, calcium, and magnesium. Silicate minerals are the building blocks of most rocks on Earth's surface.
What do several minerals make that make up earths outer crust?
the answer to this question is literally earth's crust.
What makes up about 95 percent of the rocks in earths crust?
Igneous and metamorphic rock make up 95% of the rocks in Earth's crust. Only a thin layer is made up of sedimentary rock.
How many minerals make up the earths crust and what part of the crust do they make up?
Sounds like a homework question...
What layers make up earths lithosphere?
crust and upper mantle
How many common elements make up earths crust?
17 only
How does tension change the shape earths crust?
because when it acts on the surface it stretches the rock to make craters or " dents" on the crust.
What are three parts that make up earths mantle?
The three parts that make up the Earths mantle are the crust, core, and mantle.
