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About Vanadium
About Titanium
About Scandium
About calcium
About Potassium
About Argon
About chlorine
About Sulfur
About Phosphorus
About Silicon
About Aluminium
About Magnesium
About Sodium
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Periodic table name of 118 elements
UPSC optional chemistry peper 2nd syllabus explain chapter and topics
UPSC optional chemistry paper 1st syllabus explain chapter and topics
UPSC optional chemistry