Which element has 123 neutrons

Haynes, ed. Version 1. Coursey, D. Schwab, J. Tsai, and R. Dragoset, Atomic Weights and Isotopic Compositions version 4.

Periodic Table of Videos , accessed December Podcasts Produced by The Naked Scientists. Download our free Periodic Table app for mobile phones and tablets. Explore all elements. D Dysprosium Dubnium Darmstadtium.

E Europium Erbium Einsteinium. F Fluorine Francium Fermium Flerovium. G Gallium Germanium Gadolinium Gold. I Iron Indium Iodine Iridium. K Krypton. O Oxygen Osmium Oganesson. U Uranium. V Vanadium. X Xenon. Y Yttrium Ytterbium. Z Zinc Zirconium. Membership Become a member Connect with others Supporting individuals Supporting organisations Manage my membership.

Facebook Twitter LinkedIn Youtube. Discovery date. Discovered by. Origin of the name. The name is derived from the Latin 'tellus', meaning Earth. Melting point. Boiling point. Atomic number. Relative atomic mass. Key isotopes. Electron configuration. CAS number. ChemSpider ID. ChemSpider is a free chemical structure database. Electronegativity Pauling scale. Common oxidation states. Atomic mass. Half life.

Mode of decay. Relative supply risk. Crustal abundance ppm. Top 3 producers. Top 3 reserve holders. Political stability of top producer. Political stability of top reserve holder. Young's modulus GPa. Shear modulus GPa. Bulk modulus GPa. Vapour pressure. Temperature K. Pressure Pa. Listen to Tellurium Podcast. Transcript : Chemistry in its element: tellurium Promo You're listening to Chemistry in its element brought to you by Chemistry World , the magazine of the Royal Society of Chemistry.

End promo Chris Smith Hello! Peter Wothers Tellurium, it sounds like a Dr. Chris Smith A chemist, who takes his inspiration from the heavens, that was Peter Wothers from Cambridge University, telling the story of tellurium.

Victoria Gill And initially its lack of reactivity meant there were no obvious uses for Neon. Chris Smith But they did want to see their names written in lights and that's exactly what Georges Claude did next as Victoria Gill will be telling us next time.

Promo Chemistry in its element is brought to you by the Royal Society of Chemistry and produced by thenakedscientists. He discovered it spectroscopically in England. He isolated it. In , the French chemist Claude August again isolated it. Thallium does not have many uses. It is used in photocells because of the electrical conductivity of thallium sulphide. Thallium was originally used to help treat ringworm and many other skin infections.

It was then limited because of the narrow margin between the benefits and its health risks. Thallium bromide-iodide crystals are still used as infrared detectors. Thallium sulphate used to be widely used as a pesticide and an ant killer. It was odorless and tasteless and worked well, but it was found to be too toxic. Thallium slats which burn with a bright green flame are used in flares and rockets.

There are 3. How do you find electrons in an element? The number of electrons in a neutral atom is equal to the number of protons.

The mass number of the atom M is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom M and the atomic number Z.

How do you find electrons in an ion? The charge on the ion tells you the number of electrons. If the charge is positive, subtract that number from the atomic number to get the number of electrons. You have more protons. If the charge is negative, add the amount of charge to the atomic number to get the number of electrons.

How do you figure out neutrons? Take note that the nucleus of an atom is composed of protons and neutrons. And the number of particles present in the nucleus is referred as mass number Also, called as atomic mass. So, to determine the number of neutrons in atom, we only have to subtract the number of protons from the mass number.

What is Nihonium used for? By continuing, you agree to accept cookies in accordance with our Cookie policy.

Thallium Tl. Diagram of the nuclear composition, electron configuration, chemical data, and valence orbitals of an atom of thallium atomic number: 81 , an isotope of this element. The nucleus consists of 81 protons red and neutrons orange. The stability of an element's outer valence electrons determines its chemical and physical properties. Thallium is a post-transition metal in group 13, period 6, and the p-block of the periodic table.