Which of the following atomic numbers (which are the same as the number of electrons in a neutral atom)correspond to a Group 2 metal,i.e.their ground-state electronic configuration ends in "..s^2"? A)4,14,20 B)4,22,40 C)6,12,22 D)4,12,38 E)4,14,38

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Group 2 metals, also known as alkaline earth metals, have electronic configurations ending in "s²". The atomic numbers 4 (Beryllium), 12 (Magnesium), and 38 (Strontium) correspond to Group 2 metals.

Which of the Following Atomic Numbers (Which Are the Same