Chemistry, 16.11.2020 21:50 lucia87

The fact that the four new elements are Period 7 of the table means that they all A. have seven shells of electrons

B. have seven valence electrons

C. form ions with charges of 7+

D. have an effective nuclear charge of 7+

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The fact that the four new elements are Period 7 of the table means that they all A. have seven she...