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In the ground state, all of the atoms of Period 3 elements have the same

A) atomic number
B) number of oxidation states
C) number of occupied energy shells
D) atomic mass

User Mwilliams
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Answer:

C) number of occupied energy shells

Step-by-step explanation:

Atomic numbers of different elements must differ, as well as atomic masses. The number of oxidation states differs per atom as well.

User Robert Stam
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