In the modern periodic table, sulphur (atomic number 16) is surrounded by elements with atomic number 8, 15 and 17? Which of these have physical and chemical properties resembling sulphur?
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The electronic configuration of Ca(20) is =2,8,8,2
Number of valance electrons =2
The elements with atomic number 12 and 38 both have 2 valence electrons in their outer shell but elements with 19 has 1 valance electron and 21 has 3 valance electrons. Therefore elements with atomic number 12 and 38 have physical and chemical properties resembling calcium.
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