States that the force times the distance on one side of a lever's fulcrum equals the force times the distance on the other side of the fulcrum, this is the:

Explanation:

It is said to be in equilibrium about the fulcrum . It is the principle of moments.

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.