Gold is one of the rarest elements in the universe, yet it is extracted from ores on Earth. How is this possible?
What will be an ideal response?
Gold does not bond with other elements and the native metal is extremely concentrated in the Earth's crust, which allows it to be extracted from rocks but low concentrations still contribute to its low price.
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Osmium tetroxide is widely used in electron microscopy because it is an excellent lipid fixative. However, osmium tetroxide can quickly cause irritation of the eyes and skin
Therefore, when handling osmium tetroxide, people should use a chemical hood and wear gloves to protect again osmium tetroxide's A) ignitability. B) toxicity. C) photoreactivity. D) corrosivity.
The elements iron (Fe) and sulfur (S) bond when the elements donate and receive electrons between each other. This type of bond is considered a(n) _______.
A) ionic bond B) hydrogen bond C) covalent bond D) methane bond
What effect do water wells have on an aquifer? What will be an ideal response?
You examine an igneous rock that has mineral grains which are 2.5 cm in size (large), and are primarily dark green and black color. Which statement concerning the rock is not accurate?
A. A likely rock name for this specimen would be a gabbro. B. The textural classification of the rock would be coarse grained. C. This rock likely has minerals with chemical elements like iron and magnesium in them. D. The composition of the magma that formed this rock would be Felsic. E. This rock would be classified as a plutonic rock.