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(Solved): The heaviest known alkaline earth metal is radium, atomic number \( 88 . \quad \) Part A. ...
The heaviest known alkaline earth metal is radium, atomic number \( 88 . \quad \) Part A. Find the atomic numbers of the as yet undiscovered next two members of the series. Express your answers as integers separated by a comma.
Expert Answer
Ans: 1) Radium(Ra) has an atomic number 88 which lies in the seventh period. This implies that the atomic numbers of thee undiscovered elements would be in the eighth and ninth periods. The element that comes