Fraiser Moorhouse Helium is a chemical element with the atomic number 2 in the periodic table. With 1.38 parts per million of abundance, it’s the second most plentiful chemical element in Earth’s atmosphere after hydrogen. Element 2 is classified as a member of the noble gases family of elements, i.e in Group 18 (VIIIA) of the periodic … Read more
Neon is a chemical element with the atomic number 10 in the periodic table. It’s the fourth most abundant element found in the Universe, with an abundance of 0.00022% in Earth’s crust. Being a member of the noble gasses group in the periodic table, this chemically inert substance has eight valence electrons and does not … Read more
Argon is the third most plentiful natural gas found in the Earth’s atmosphere. It has no color, odor, or taste. With the chemical symbol Ar and atomic number 18, argon is an inert gas belonging to the family of monatomic noble gases in the periodic table of elements. This chemical element is also the first … Read more
Krypton is a chemical element with the atomic number 36 in the periodic table. According to the chemical calculations, there is about 0.000108 to 0.000114 percent of krypton gas in Earth’s atmosphere. Trace amounts of krypton can also be naturally formed in some minerals contained in Earth’s crust by the disintegration of radioactive elements such … Read more
Xenon is a chemical element with the atomic number 54 in the periodic table. It can be traced in Earth’s crust and mantle with an abundance of 30 parts per trillion (0.000000003%). Since element 54 is a gaseous substance that escapes easily into the atmosphere, larger quantities of this trace gas cannot remain in the … Read more
Radon is a radioactive chemical element with the atomic number 86 in the periodic table. It’s found in the soil and rocks that constitute Earth’s crust. As a member of the noble gas family of periodic table elements, this monoatomic gas has eight valence electrons that prevent radon from making chemical reactions with other chemical … Read more
Group of elements – Non-Metal Name Symbol Atomic Number Atomic weigth Hydrogen H 1 1.00794 Boron B 5 10.811 Carbon C 6 12.011 Nitrogen N 7 14.00674 Oxygen O 8 15.9994 Silicon Si 14 28.0855 Phosphorus P 15 30.973762 Sulfur S 16 32.066 Arsenic As 33 74.92159 Selenium Se 34 78.96 Tellurium Te 52 127.6
Tellurium is a chemical element with the atomic number 52 in the periodic table. It’s an extremely rarely found element in Earth’s crust. Its occurrence can be compared with that of the element platinum. Being a member of the chalcogen elements family of the periodic table, this rare, silver-white metalloid element possesses the chemical properties … Read more
Selenium is a chemical element with the atomic number 34 in the periodic table. It occurs naturally in Earth’s crust, especially in carbonate rocks and volcanic and sedimentary soils. Being a member of the sulphur group of periodic table elements, this chalcogen has six electrons in the outermost shell and valences of -2, 4, and … Read more
Arsenic is a chemical element with an atomic number 33 in the periodic table of elements. There’s 1.5–2 ppm of this crystalline metalloid in the Earth’s crust. Being a member of the phosphorus family of periodic table elements, this chemical element has five valence electrons that help arsenic make numerous compounds with other substances. Chemical … Read more