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An element with atomic number 20 will be...

An element with atomic number 20 will be placed in which period of the periodic table ?

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The correct Answer is:
4
Electronic configuration ` = 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 4s^(2)` . Period no. = highest principal quantum no. = 4
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Knowledge Check

  • The total number of elements in period 3 of the periodic table is:

    A
    a)2
    B
    b)8
    C
    c)18
    D
    d)32

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