Answer: None of the options
Explanation: 2, 8, 4 represents a total of 14 electrons.
The 2: 1s^2
The 8: 2s^2 2p^6
The 4: 3s^2 3p^2
Assuming a neutral atom, 14 electrons represnt element #14, Silicon. The electron configuration matches that of silicon, But silicon is in group 14, which is not in the options. It is a metalloid, so if there is another grouping system, use the nuimber assigned to the metalloids. But the word "Group"normally refers to the column number, 14 for silicon. And I've never heard of Group 0.
