{:(1."Arrangement of electrons in energy shells", a."Valence shell"),(2."Maximum number of electrons = 18",b."Electronic configuration"),(3."Outermost shell of an atom",c."Valency"),(4."Combining cpacity of the atoms of an element",d."Number of charge it carries"),(5."An element with 8 valence electrons",e."M energy shell"),(6."Valency of a radical",f."Octet configuration"):}

{:(1."Arrangement of electrons in energy shells", a."Valence shell"),(

1.	{:(1."Arrangement of electrons in energy shells", a."Valence shell"),(2."Maximum number of electrons = 18",b."Electronic configuration"),(3."Outermost shell of an atom",c."Valency"),(4."Combining cpacity of the atoms of an element",d."Number of charge it carries"),(5."An element with 8 valence electrons",e."M energy shell"),(6."Valency of a radical",f."Octet configuration"):}
Answer» Answer :1. b 2. e 3. a 4. C 5. d