I just needed help on a few questions for my chemistry homework...?

Posted on 2016-03-28 18:44:00 in Chemistry by NAMEN

(K Ca Sc) which one has the lowest electronegativity? 

(Si Ge Sn) which one has the lowest metallic activity? 

(S Tc Sr) which ionic radius is larger than its atomic radius? 

(Bi Po At) which one has the greatest ionization energy? 

(S Cl Ar) which has the greatest electronegativity?

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