Select the group of symbols that would correctly complete the following statements, respectively.___ is the heaviest noble gas.___ is the transition metal that has 24 electrons as a 3+ ion.___ is the halogen in the third period.___ is the alkaline earth metal that has 18 electrons as a stable ion.

Question

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- Rn (Radon) is the heaviest noble gas.
- Co (Cobalt) as a 3+ ion has 24 electrons (the same as 3d7 electron configuration).
- Cl (Chlorine) is the halogen in the third period.
- Ca (Calcium) as a stable ion has 18 electrons (the same as noble gas configuration).

Select the Group of Symbols That Would Correctly Complete the Following