Q.The electronic configuration of an element is $1s^2 2s^2 2p^6 3s^2 3p^3$ . What is the atomic number of the element, which is just below the above element in the periodic table?

31

34

33

49

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Q.The electronic configuration of an element is 1s22s22p63s23p31s^2 2s^2 2p^6 3s^2 3p^31s22s22p63s23p3. What is the atomic number of the element, which is just below the above element in the periodic table?