Which neutral element has the following electron configuration? 1 s^2 2s^2 2 p^6 3 s^2 3 p^41s 2 2s 2 2p 6 3s 2 3p 4

i think the answer is terrae but not 100 percent sure. ▓▬▬ §

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.