position of elements in modern periodic table
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which element 's position you want to know
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Position of elements in modern periodic table is based on the element's atomic number 'Z', which is the number of protons, as well as the chemical similarity with other elements. For examples highly electronegative elements like Chlorine, Fluorine, Bromine, Iodine etc. are part of a group called 'halogens'.
Elements with same number of shells are placed in a horizontal 'period', while elements with same number of valence electrons are placed in a vertical 'group'.
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