What does the angular momentum quantum number determine?

The shape of an orbital  

Explanation:

The orbital angular momentum quantum number l defines the shape of an orbital.

l = 0: s orbital  — spherical

l = 1: p orbital  — two lobes, pointing along a Cartesian axis

l = 2: d orbital — four lobes, pointing toward the corners of a square

l = 3: f orbital  — eight lobes, pointing toward the corners of a cube

b) mutualism

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frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa