![]() ![]() Let’s take an example of sodium (Na) that has atomic number 11. Thus, according to this method, 2 electrons are allotted in the first shell, 8 electrons in the second shell, and 18 electrons in the third shell. In order to find out the charge, first examine the configuration of electrons in the orbitals or shells (S, P, D, and F shells) as per the 2n 2 rule (where ‘n’ is the number of shells). Briefly speaking, the charge of an element in its ionic form refers to the actual number of electrons that it loses or gains to achieve the nearest noble gas configuration. And a periodic table with atomic mass and charges interprets both the charges and atomic mass. Likewise, the periodic table with charges illustrates elements with the probable charges, when they are in the ionic form. You may also come across periodic table with atomic mass that gives a simplified view of the elements with their respective mass numbers (total number of protons and neutrons). This labeled periodic table of element with names and their atomic number helps in easy interpretation of the properties of elements. Thus, instead of sorting elements as per their mass number (which is so in Mendeleev periodic table), elements are arranged from left to right, according to increasing order of the atomic number. The modern periodic table of elements, or just periodic table, is a tabular representation of the identified elements (as of date 118) along with their respective symbolic name and atomic number. ![]()
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