The element X, Y, Z and T have the indicated electronic configurations. Starting with the innermost shell, which is the most metallic element

A,B and C are three concentric metallic shells . Shell A is the innermost and shell C is the outermost. A is given some charge (i) The inner surfaces of Band C will have the same charge (ii) The inner surfaces of B and C will have the same charge density (iii) The outer surfaces of A,B and C will have the same charge (iv) The outer surfaces of A,B and C will have the same charge density

The atomic number of an element having the valency shell electronic configuration 4s^2 4p^6 is

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The atomic number of an element is 35 and mass number is 81. The number of electrons in the outer most shell is (a) 7 (b) 6 (c) 5 (d) 3

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