![]() Hydrogen was discovered by Robert Boyle in 1671 from his work reacting acids and metals together but it was not until 1766 that the scientist Henry Cavendish isolated it as an element. Hydrogen exists as a diatomic molecule, where two Hydrogen atoms are covalently bonded together. It has a melting point of -259°c and a boiling point of -252°c. As it is a non metal if it is located in Group 1 it can be misleading. Hydrogen is located usually in Group 1 but can also be located in the centre of the periodic table. It was used in the German airship, the Hindenburg which tragically exploded due to the flammable nature of Hydrogen in 1937. ![]() It has a large use in powering rockets in the NASA space program due to its high combustibility. It is possible to combust Hydrogen with Oxygen to create water as a by product and generate electricity in a cell. Hydrogen is being explored as use for a fuel. It is the most basic among all the periodic table elements in the. It is used in industrial processes such as the Haber process and the hydrogenation of fats. Hydrogen is the first member of the periodic table with the symbol H and atomic number 1. Being constructed of 1 proton and 1 electron it has no neutrons. Hydrogen is the most abundant element in the universe. It is a noble gas, non-metal and is the most abundant element in the universe. Therefore, there are various non-equivalent definitions of atomic radius.Hydrogen (H) is a tasteless, colorless, odorless gas and has the atomic number 1. However, this assumes the atom to exhibit a spherical shape, which is only obeyed for atoms in vacuum or free space. The atomic radius of a chemical element is a measure of the distance out to which the electron cloud extends from the nucleus. It must be noted, atoms lack a well-defined outer boundary. The atomic radius of Hydrogen atom is 31pm (covalent radius). Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. ![]() The atomic mass is carried by the atomic nucleus, which occupies only about 10 -12 of the total volume of the atom or less, but it contains all the positive charge and at least 99.95% of the total mass of the atom. The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element. Mass numbers of typical isotopes of Hydrogen are 1 2. Isotopes are nuclides that have the same atomic number and are therefore the same element, but differ in the number of neutrons. The difference between the neutron number and the atomic number is known as the neutron excess: D = N – Z = A – 2Z.įor stable elements, there is usually a variety of stable isotopes. Neutron number plus atomic number equals atomic mass number: N+Z=A. The total number of neutrons in the nucleus of an atom is called the neutron number of the atom and is given the symbol N. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10 -19 coulombs. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons in its nucleus. Atomic Number – Protons, Electrons and Neutrons in Hydrogen
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