dal11 said:
that they want you to assume that there's an invisible spring with a mass of 2.12×10-25 kg at either end and an oscillation frequency of 7.53×1012 Hz, and to find the spring constant. 
dal11 said:
The force constant between 2 atoms is a measure of how strong the bond is between the atoms. It represents the amount of force required to stretch or compress the bond by a certain distance.
The force constant is calculated by dividing the force applied to the bond by the change in bond length. This can be done experimentally or through computational methods.
The force constant can be affected by the types of atoms involved, the bond length, and the surrounding environment such as temperature and pressure.
The higher the force constant, the stiffer the bond between 2 atoms. A higher force constant means that the bond is more difficult to stretch or compress, making it stronger.
Yes, the force constant can change depending on the conditions of the atoms and the bond. For example, increasing the temperature can cause the bond to become weaker, resulting in a lower force constant.