It could be gas or liquid or metal or mineral or a mixture or anything, really. At standard temperature and pressure, oxygen is a colorless gas. In both liquid phase C and solid phase C , oxygen is clear with a light sky blue color.
Krypton is a gas down to ,36 0C. Neon is a colorless, odorless, tasteless gas with a boiling point of Oxygen is a gas. It stays as diatomic molecules. This gas is colorless and odorless. No, oxygen is a non-metallic substance. At normal air temperature 20 degrees C it is a gas. A It feels like a rock. B It smells like a lemon. C It is colorless.
They are the reactants and the red-brown gas is the product. A boiling point isn't a substance at all. The boiling point of a substance is the temperature at which it changes from liquid to gas. It contains Cl,H and C atoms. It is a colorless liquid. Pure substance. It depends on the substance's boiling and freezing temperatures.
C that's why pasteurization is at 60 c. Log in. Study now. See Answer. Best Answer. Study guides. Chemistry 20 cards. Of course, there's also "dark matter" and "dark energy" to worry about, but that's another story. Hydrogen, helium, and trace amounts of lithium were produced at the beginning of the Universe in the Big Bang, and became concentrated into stars by the force of gravity.
The fusion of hydrogen atoms in stars to produce helium produces huge amounts of energy; the energy in sunlight is captured by plants in photosynthesis, and drives most of the chemistry of living organisms. The most common isotope of helium, helium-4, consists of two protons and two neutrons in the nucleus, surrounded by two electrons. Helium is found along with some radioactive minerals that decay by alpha particle emission, however the concentration of helium in these minerals is very low.
The main source of helium is from natural gas, where it is separated out from the other components by fractional distillation. Helium liquefies at 4. Some materials become superconductors when immersed in liquid helium; in these materials, there is no resistance to the flow of electricity.
Superconducting magnets are used for an important medical imaging technology called Magnetic Resonance Imaging MRI , which allows images of tissues and organs to be obtained. A related technology is used by chemists to obtain information that can be used to deduce the structures of molecules; this technique is called Nuclear Magnetic Resonance NMR ; the two technologies are basically the same, but the term "nuclear" is avoided in the medical application because of its unpleasant associations even though there is no nuclear radiation involved.
Helium is also used in blimps, where the combination of being lighter than air and nonflammable makes it much safer than hydrogen as demonstrated in the explosion of the Hindenburg. It is also used in deep-sea diving, since helium is less soluble in the bloodstream than nitrogen, and reduces the risk of the diver suffering nitrogen narcosis, high pressure nervous syndrome HPNS , or the bends. Breathing helium gas causes the voice to become higher pitched because helium is less dense than air, changing the frequency of the sound waves generated in the larynx.
Neon is a colorless, odorless, unreactive gas which liquefies at Neon was discovered in by Sir William Ramsay see entry on Argon below and his assistant Morris Travers while working with a sample of krypton. The name comes from the Greek word for "new," neos. It is found in the Earth's crust at a concentration of 70 ppt, making it the 80th most abundant element; it is found in the atmosphere at a concentration of 18 ppm by volume.
Neon which is used commercially is extracted from liquid air by fractional distillation. Neon is used primarily in neon lights ; stimulating neon with electricity causes it to emit an intense red light.
Other noble gases are used in "neon lights" as well, to produce different colors. Neon is also used in some underwater breathing mixtures; liquid neon is used in low-temperature cooling. Argon is a colorless, odorless, unreactive gas which liquefies at It is found in the Earth's crust at a concentration of 1. Neon is a gas at 60 degrees C. Different substances have different properties ; density is one property that can be used to tell two substances apart.
Density is a property that does not depend on the shape or size of an object. Only two elements are liquid at standard conditions for temperature and pressure: mercury and bromine. Four more elements have melting points slightly above room temperature: francium, caesium, gallium and rubidium.
By category. The vast majority of simple inorganic e. Transition metal compounds are often colored because of transitions of electrons between d-orbitals of different energy. All liquids show the following characteristics: Liquids are almost incompressible.
In liquids molecules are pretty close to each other. Liquids have fixed volume but no fixed shape. Liquids flow from higher to lower level. Liquids have their boiling points above room temperature, under normal conditions. Liquids boil when their vapor pressure is equal to the pressure exerted on the liquid by its surroundings. The normal boiling point of water is o C because this is the temperature at which the vapor pressure of water is mmHg, or 1 atm.
The water will boil the fastest, if tested against milk and apple juice at the same temperature, because water has the least amount of ingredients in it allowing it to boil faster.
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