Elements
Aluminum.
Copper.
Sulphur.
Molecules
NaCl
Organic Molecules
Benzene
Image courtesy of JPL/NASA
Naphthalene
Image courtesy of JPL/NASA
Chrysene
Image courtesy of JPL/NASA
Perylene
Image courtesy of JPL/NASA
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Nitric acid is a colorless, corrosive liquid and a toxic acid which can cause severe burns. Nitric acid consists of nitrogen, oxygen, and hydrogen atoms. Nitric acid, in its gas phase, is present in very
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Sulfuric acid is a viscous, oily liquid and a strong acid which can cause severe burns. Sulfuric acid consists of sulfur, oxygen, and hydrogen atoms. Sulfuric acid is one of the components of acid rain.
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Methane is gas that is found in small quantities in Earth's atmosphere. Methane is the simplest hydrocarbon, consisting of one carbon atom and four hydrogen atoms. Methane is a powerful greenhouse gas.
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Ammonia is a chemical compound that is a colorless, flammable gas at normal temperatures and pressures. Ammonia is toxic, corrosive to some materials, and has a pungent odor. An ammonia molecule (NH3)
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Nitrogen is a chemical element with an atomic number of 7 (it has seven protons in its nucleus). Molecular nitrogen (N2) is a very common chemical compound in which two nitrogen atoms are tightly bound
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Oxygen is a chemical element with an atomic number of 8 (it has eight protons in its nucleus). Oxygen forms a chemical compound (O2) of two atoms which is a colorless gas at normal temperatures and pressures.
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Hydrogen peroxide (H2O2) is a chemical compound consisting of two oxygen atoms and two hydrogen atoms. It is a clear liquid at normal temperatures and pressures. Hydrogen peroxide is a very reactive chemical.
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