Answer:
17 electrons
Potassium normally has 19 electrons but the +2 implies that Potassium lost 2 electrons making the total be 17 electrons
Not all units of measurement are equal, but the value of each unit is used for its intended purpose, so we have different units of measurement for each problem.
Kinetic energy is the energy possessed by an object due to its motion. If an object is moving, then it has kinetic energy. If an object has kinetic energy, then it is moving. Many students confuse kinetic energy with potential energy.
Turning things to gram so need to convert to the metric system