Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. The chemical symbol for Zirconium is Zr. Making up about 2.1% of the weight of the Earth’s crust, potassium is the eighth-most abundant element in the crust. Atomic Number of Potassium. Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. Since nucleons (protons and neutrons) make up most of the mass of ordinary atoms, the density of normal matter tends to be limited by how closely we can pack these nucleons and depends on the internal atomic structure of a substance. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. The chemical symbol for Neptunium is Np. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. Free Labeled Periodic Table of Elements with Name [PDF & PNG], Properties of Potassium Periodic Table Elements | Atomic Mass [PDF], What is Electronegativity Chart | List of Electronegativity [PDF]. The information contained in this website is for general information purposes only. All Rights Reserved. Einsteinium is the seventh transuranic element, and an actinide. Lanthanum is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. The chemical symbol for Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. 2) You may not distribute or commercially exploit the content, especially on another website. The chemical symbol for Radium is Ra. 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. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. Potassium is a chemical element with symbol K and atomic number 19. Neptunium is the first transuranic element. The chemical symbol for Copper is Cu. Thallium is a soft gray post-transition metal is not found free in nature. Units of measure have been defined for mass and energy on the atomic scale to make measurements more convenient to express. Consequently, the smallest atom is helium with a radius of 32 pm, while one of the largest is caesium at 225 pm. As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine. It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. Bromine is a chemical element with atomic number 35 which means there are 35 protons and 35 electrons in the atomic structure. The chemical symbol for Berkelium is Bk. The bulk properties of astatine are not known with any certainty. It is denoted by the symbol ‘K’. The atomic mass of potassium is 39.098 atomic mass units. The chemical symbol for Silicon is Si. Our Website follows all legal requirements to protect your privacy. Europium is one of the least abundant elements in the universe. The information contained in this website is for general information purposes only. Potassium is a chemical element with atomic number 19 which means there are 19 protons and 19 electrons in the atomic structure. Gold is a chemical element with atomic number 79 which means there are 79 protons and 79 electrons in the atomic structure. The chemical symbol for Helium is He. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. Silver is a soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily unreactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning. Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. For example, 63Cu (29 protons and 34 neutrons) has a mass number of 63 and an isotopic mass in its nuclear ground state is 62.91367 u. It is very light, so it can float in water. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. Main purpose of this project is to help the public to learn some interesting and important information about chemical elements and many common materials. The nucleus is composed of protons and neutrons. Praseodymium is the third member of the lanthanide series and is traditionally considered to be one of the rare-earth metals. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. Sodium is an alkali metal, being in group 1 of the periodic table, because it has a single electron in its outer shell that it readily donates, creating a positively charged atom—the Na+ cation. Atomic mass of Potassium is 39.0983 u. The chemical symbol for Mendelevium is Md.  The density of Hassium results from its high atomic weight and from the significant decrease in ionic radii of the elements in the lanthanide series, known as lanthanide and actinide contraction. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. For 12C the atomic mass is exactly 12u, since the atomic mass unit is defined from it. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. If you continue to use this site we will assume that you are happy with it. 2) You may not distribute or commercially exploit the content, especially on another website. Potassium is considered chemically similar to sodium, the alkali metal above it on the periodic table. Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. Ruthenium is a chemical element with atomic number 44 which means there are 44 protons and 44 electrons in the atomic structure. Rhenium is a chemical element with atomic number 75 which means there are 75 protons and 75 electrons in the atomic structure. An alloy of sodium and potassium (NaK) is used as a heat-transfer medium. Astatine is the rarest naturally occurring element on the Earth’s crust. The atomic mass is the mass of an atom. Niobium is a soft, grey, ductile transition metal, often found in the minerals pyrochlore (the main commercial source for niobium) and columbite. Potassium bicarbonate is the chemical name for baking soda. The chemical symbol for Dysprosium is Dy. Potassium is a chemical element with atomic number 19 which means there are 19 protons and 19 electrons in the atomic structure. The chemical symbol for Silver is Ag. Classified as an alkali metal, Potassium is a solid at room temperature. Units of measure have been defined for mass and energy on the atomic scale to make measurements more convenient to express. Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure. Its extreme rarity in the Earth’s crust, comparable to that of platinum. 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. It is an intensive property, which is mathematically defined as mass divided by volume: The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons.