Elements in the first row (hydrogen and helium) will have outer electrons in the first energy level. Their principal quantum number is 1. Elements in the second row (lithium through neon) will have valence electrons in the second energy level with a principal quantum number of 2.
The answer would be B. Unorganized deposits of rock and sediment. Hope this helps. :)
<span>She may be carrying diseases, which the natives have no immunities.</span>
