It's the first element in the Periodic Table. Hydrogen is colorless and odorless in normal conditions. Hydrogen is diatomic, meaning it is most often found as H2(Other elements that are diatomic are Oxygen, Fluorine, Bromine, Iodine, Nitrogen and Chlorine, Or HOFBrINCl, respectively) . The hydrogen atom is formed by a nucleus with one unit of positive charge, a proton, and one of an electric charge, an electron. The atomic number of hydrogen is 1 and its atomic weight is approximately 1.00797 g/mol. It is one of the main compounds of water. It's widely spread throughout Earth's atmosphere, yet it is only considered to be 0.000055% of gases in the atmosphere. It has three hydrogen isotopes: Protium, containing 0 neutrons in the neucleus, found in more than 99.985% of the natural element; Deuterium, containing both a proton and a neutron in the neucleus, found in nature in 0.015% approximately; and Tritium, containing one proton and two neutrons in the nucleus, which appears in small quantities in nature. It can be artificially produced by various nuclear reactions. Hydrogen is the main cause of one of the strongest bonds: Hydrogen bonds, present in Hydrogen Fluoride, Water (H2O) and Ammonia (NH3). As well, Hydrogen's chemical properties lead to its extremely low point of vaporization and currently unknown definite point of solidification.
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The chemical formula for zinc chloride is ZnCl2, and for hydrogen gas, it is H2.
When you combust hydrogen in air, the hydrogen will combine with oxygen to form water. Therefore, the hydrogen and oxygen are undergoing a chemical change to become bonded together producing H2O: 2H2 + O2 → 2H2O + Heat
Hydrogen, chlorine, and sodium are examples of chemical elements. Each element is a unique type of atom that has specific properties and characteristics. Hydrogen is a colorless, odorless gas, chlorine is a greenish-yellow gas, and sodium is a soft, silvery metal.
The letter H is the chemical symbol for the element hydrogen.
The reaction of sodium metal with water to produce hydrogen gas is a chemical property. This is because a new substance (hydrogen gas) is formed as a result of a chemical reaction between sodium and water.