Question 49 (b) An element X which is a yellow solid at room temperature shows catenation and allotropy. X forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants.
Write the electronic configuration of X.
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Solution
The element is sulphur. It is located in the 3rd period and group 16 of the modern periodic table. The electronic configuration of sulphur is 1s22s22p63s23p4.