Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. Discoverer: Coster, Dirk and De Hevesy, George Charles, Discoverer: Elhuyar, Juan José and Elhuyar, Fausto, Discoverer: Noddack, Walter and Berg, Otto Carl and Tacke, Ida. If you continue to use this site we will assume that you are happy with it. Neutrons stabilize the nucleus, because they attract each other and protons , which helps offset the electrical repulsion between protons. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. Nickel is a silvery-white lustrous metal with a slight golden tinge. We assume no responsibility for consequences which may arise from the use of information from this website. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. 2) You may not distribute or commercially exploit the content, especially on another website. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. The chemical symbol for Bismuth is Bi. Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. Its abundance in rocky planets like Earth is due to its abundant production by fusion in high-mass stars. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air. Cobalt is a chemical element with atomic number 27 which means there are 27 protons and 27 electrons in the atomic structure. 20-10 = 10. One unified atomic mass unit is approximately the mass of one nucleon (either a single proton or neutron) and is numerically equivalent to 1 g/mol. The chemical symbol for Actinium is Ac. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. The chemical symbol for Iron is Fe. Neutron Number and Mass Number of Neon. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. Use of this web site is restricted by this site's license The Cookies Statement is part of our Privacy Policy. Heavy nuclei with an even number of protons and an even number of neutrons are (due to Pauli exclusion principle) very stable thanks to the occurrence of ‘paired spin’. The Cookies Statement is part of our Privacy Policy. Ask Question + 100. Neon is a chemical element with the symbol Ne and atomic number 10. Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. Commercially, thallium is produced as a byproduct from refining of heavy metal sulfide ores. The chemical symbol for Radium is Ra. It is a noble metal and a member of the platinum group. (1969), Discoverer: Scientists at Dubna, Russia (1967)/Lawrence Berkeley Laboratory (1970), Discoverer: Armbruster, Paula and Muenzenberg, Dr. Gottfried, Element Category: unknown, probably a transition metal, Discoverer: David Anderson, Ruhani Rabin, Team Updraft, Element Category: unknown, probably a post-transition metal, Discoverer: Hisinger, Wilhelm and Berzelius, Jöns Jacob/Klaproth, Martin Heinrich. A crystal lattice is a repeating pattern of mathematical points that extends throughout space. the number of protons tell you the atomic number. This page was created by Yinon Bentor. Significant concentrations of boron occur on the Earth in compounds known as the borate minerals. Electrical resistance is expressed in Ohms. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. According to the Einstein relationship (E=mc2), this binding energy is proportional to this mass difference and it is known as the mass defect. Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium. Neon was the second of these three rare gases to be discovered and was immediately recognized as a new element from its … Actinium is a soft, silvery-white radioactive metal. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. To determine the stability of an isotope you can use the ratio neutron/proton (N/Z). The chemical symbol for Praseodymium is Pr. Pure radium is silvery-white alkaline earth metal. The most common are ""_10^20Ne (10 protons, 90.48% abundance), ""_10^21Ne (11 protons, .27% abundance), and ""_10^22Ne (12 protons, 9.25% abundance). Create your account. Silicon is a hard and brittle crystalline solid with a blue-grey metallic lustre, it is a tetravalent metalloid and semiconductor. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure.    Noble Gases The chemical symbol for Boron is B. Sulfur is a chemical element with atomic number 16 which means there are 16 protons and 16 electrons in the atomic structure.