9/22/2023 0 Comments Cobalt 60 molar mass![]() Lastly remember to write the symbol of the atom in the middle of the atom.Įlectronic structure of sulfur atom with 16 electrons will look like this:Įlectronic configuration shows distribution of electrons of an atom in electron shells without drawing.įirst number stands for number of electrons in first shell, and second number, third and fourth number shows for number of electrons in second, third and fourth shell respectively. Third electron shell hold maximum 8 electrons (Not true for A levels, IB syllabus). Second electron shell hold maximum 8 electrons. How to draw electronic structure of atom:įirst electron shell holds maximum 2 electrons. Describe the build-up of electrons in ‘shells’ and understand the significance of the noble gas electronic structures and of the outer shell electrons.Since mass number = protons + neutrons, number of neutrons = mass number – proton number.įor an atom, number of protons is equal to number of electrons, so the number of electrons for sulfur atom is 16. ![]() Use proton number and the simple structure of atoms to explain the basis of the Periodic Table, with special reference to the elements of proton number 1 to 20.Define nucleon number (mass number): the total number of protons and neutrons in the nucleus of an atom. ![]()
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