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22 January, 11:49

Identify the element below and give the symbols of the other elements in its group. [ar]4s23d104p4 element symbol:

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  1. 22 January, 12:01
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    [Ar]4s²3d¹⁰4p⁴

    We see that the last level is this element is 4, so this element should be in

    4th period, it has 4 p-electrons, so it should be in 16th group.

    4th period, 16th group - it is Se.

    You can also go to the next element after Ar, and count beginning of this element 16. (2+10+4 = 16 electrons)

    From "K" (where K is the first) you count to 16 and it is going to be Se.
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