A part of periodic table is shown in the...

A part of periodic table is shown in the adjacent figure.
a. Write the symbol of the element 'B'.
b. Will elements 'C' and 'D' have same number of valence electrons?
c. Arrange elements 'A', 'B' and 'C' in increasing order of their metallic character.
d. What is the number of electrons in L shell of element 'E'?
e. Name any two elements that will have properties similar to that of element 'A'

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