Help Text. Learn Chemistry : Your single route to hundreds of free-to-access chemistry teaching resources. We hope that you enjoy your visit to this Site.
We welcome your feedback. Data W. 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. William Hyde Wollaston. Origin of the name. Palladium is named after the asteroid Pallas, in turn named after the Greek goddess of wisdom, Pallas. 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. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance.
The unit of measure for mass is the atomic mass unit amu. One atomic mass unit is equal to 1. For 12 C the atomic mass is exactly 12u, since the atomic mass unit is defined from it. For other isotopes, the isotopic mass usually differs and is usually within 0. For example, 63 Cu 29 protons and 34 neutrons has a mass number of 63 and an isotopic mass in its nuclear ground state is There are two reasons for the difference between mass number and isotopic mass, known as the mass defect :. See also: Mass Number.
Density of Palladium is Density is defined as the mass per unit volume. It is an intensive property , which is mathematically defined as mass divided by volume:.
See also: What is Density. Each electron is influenced by the electric fields produced by the positive nuclear charge and the other Z — 1 negative electrons in the atom. Since the number of electrons and their arrangement are responsible for the chemical behavior of atoms, the atomic number identifies the various chemical elements.
The configuration of these electrons follows from the principles of quantum mechanics. In the periodic table, the elements are listed in order of increasing atomic number Z. A proton is one of the subatomic particles that make up matter. In the universe, protons are abundant, making up about half of all visible matter. The proton has a mean square radius of about 0. The protons exist in the nuclei of typical atoms, along with their neutral counterparts, the neutrons.
Neutrons and protons, commonly called nucleons , are bound together in the atomic nucleus, where they account for Research in high-energy particle physics in the 20th century revealed that neither the neutron nor the proton is not the smallest building block of matter. A neutron is one of the subatomic particles that make up matter.
In the universe, neutrons are abundant, making up more than half of all visible matter. It has no electric charge and a rest mass equal to 1. The neutron has a mean square radius of about 0. Atomic nuclei consist of protons and neutrons, which attract each other through the nuclear force , while protons repel each other via the electric force due to their positive charge. These two forces compete, leading to various stability of nuclei.
Palladium was discovered by W. Wollaston in Palladium has 39 isotopes. Palladium is used as a substitute for silver in dental items and jewelry. The pure metal is used as the delicate mainsprings in analog wristwatches.
Also palladium is used in surgical instruments and as catalyst.
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