Elements A,B,C ,D E and F and their resp...

Elements A,B,C ,D E and F and their respective atomic numbers (withoin brackets) are given below "
A(3), B(10) , C(11) , D(12) , E(14) ,F (17)
(a) Which of these is
(i) a noble gas ?
(ii) an element belonging to group 17 of the periodic table ?
(iii) an element with valency 4 ?
(b) Write the electronic arrangement of E (14)
(c ) What will be the formula of the compound formed when A and F combine ?

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