An atom has three full orbitals in its second energy level.
how many electrons are present in the second energy level of the atom?
9
12
6
3

6

Explanation:

The maximum number of electrons in the orbitals of sub-levels are given as:

   for s-sublevel we have two electrons and one orbital

        p-sublevel we have six electrons and three orbitals

        d-sublevel we have ten electrons and five orbitals

       f- sublevel we have fourteen electrons and seven orbitals

The second energy level is represented by the p-sub-level and it will accommodate 6 electrons.

most sediment washes or falls into the river as a result of mass movement and runoff. other sediment eroded from the bottom or sides of the river.

dynamic equilibrium is the answer.