Question

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How?

15
1
@)ww Of the following have the same electron arrangement?.

外                  36C                  40.                       3                        40Ca+
人Cl                    37CI                    19AT                  38K+                  20Ca

交*, 3 an 38r oy

幸CL ,拉CT and 39ca ony

     

恋, 94r and 38KY ony

至CT 9Ar and 43K- only
38caT,提Ar and 33K-ony

41Kー
K

Answer 1

KDK

It is necessary to select one with the same number of outermost electrons.
When it becomes an ion, the electron goes in and out. Since chloride ion becomes an anion, one electron is added and the electron arrangement is the same as argon. On the contrary, since potassium ion becomes a cation, one electron is reduced. Therefore, the arrangement of electrons is the same as that of argon.