This quiz has been developed to test your knowledge about atomic numbers, protons, atomic mass and neutrons. The systematic element name is a temporary name that is based on the atomic number as a root and the -ium ending as a suffix. It is also divisible by 1, 41, and 82. Selenium (atomic symbol: Se, atomic number: 34) is a Block P, Group 16, Period 4 element with an atomic radius of 78.96. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. The centre of the atom is known as Nucleus, around which electrons flow which carries the negative charge. Lead is a chemical element in the carbon group under number 82. It is the sixth magic number ⦠In Science, 82 is the atomic number of lead. Its expression in words is eighty-two. For example, element 120 has the temporary name unbinilium. In some ways, it is amazing that any nuclei are stableâwith the exception of hydrogenâs main isotope, all nuclei contain protons (which should be repelling each other) in a very small space. The number of protons will always tell you what element it is; the only difference here is their atomic weight (the sum of their protons and neutrons). The chemical symbol for Lead is Pb.. Atomic Mass of Lead. Thankfully, it no longer is. An atom is a primary piece of matter which is made up of protons, neutrons, and electron called subatomic particles. All the best! atomic number 82 explanation. Facts about 82. I assume that you are referring to nuclear instability. Looking for definition of atomic number 82? Atomic number, mass number, and isotopes How to use the atomic number and the mass number to represent different isotopes The following video shows an example of calculating the number of neutrons. Number of neutrons = mass number â atomic number = 207 â 82 = 125. Atomic Number of Lead. When reversed, it becomes 28. Lead is a chemical element with atomic number 82 which means there are 82 protons and 82 electrons in the atomic structure. In mathematics, 82 is an even number because it is divisible by two. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present). The selenium atom has a radius of 120 pm and a Van der Waals radius of 190 pm. If you're interested in the different chemical properties of Barium 138 and Barium 134, I suggest the "Isotopes of Barium" page on www.wikipedia.org as a good jumping off point. As we know, in the past, all the plumbing was made of lead, which results in poisoning and death. In Roman Numerals, 82 is written as LXXXII. Lead Atomic Number: 82 Lead Atomic Weight: 207.2 What is Lead? Its symbol is Pb, after the Latin plumbum. Define atomic number 82 by Webster's Dictionary, WordNet Lexical Database, Dictionary of Computing, Legal Dictionary, Medical Dictionary, Dream Dictionary. Atomic Number: 82 Atomic Mass: 207.2 amu Melting Point: 327.5 °C (600.65 K, 621.5 °F) Boiling Point: 1740.0 °C (2013.15 K, 3164.0 °F) Number of Protons/Electrons: 82 Number of Neutrons: 125 Classification: Other Metals Crystal Structure: Cubic Density @ 293 K: 11.34 g/cm 3 Color: bluish Atomic ⦠The number of electrons in each of Selenium's shells is 2, 8, 18, 6 and its electron configuration is [Ar] 3d 10 4s 2 4p 4. The atomic number is the number of protons in the nucleus of an atom. So, let's try out the quiz. Atomic mass of Lead is 207.2 u. 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