According to the quantum mechanical model of the atom, how is the motion and position of an electron best described? a. an electron moves throughout the atom in a completely random path. b. an electron moves along an orbital path at a fixed distance from the nucleus. c. an electron moves within a cloud-like region around or near the nucleus. d. an electron stays fixed in one position near the nucleus.

C.

Explanation:

Quantum mechanics considers the electron as both a particle and a wave.

Because of its wave nature, the electron does not move in a fixed orbit. We can only say that we are more likely to find an electron in some areas of space rather than others.

Thus, the electron moves in a cloud-like region around the nucleus.

We cannot say that the electron stays in one position, moves randomly, or moves along an orbital path at a fixed distance from the nucleus.

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.