The electronic configuration of two atoms X and Y are as follows: X - 1s ² 2s ²2p ⁶3s ¹, Y -1s ²2s ²2p ⁶3s²3p ⁶4s ² which of the statements below is true of the position of X and Y in the Periodic Table?

A. x belongs to group 1, Y belongs to period 2,
B. x belongs to group 1, Y belongs to period 4  
C. x belongs to group 2, Y belongs to period 1
D. x belongs to group 3, Y belongs to period 2
E. x belongs to group 3, Y belongs to period 4

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Correct Answer: B