What is the difference between kinetic and mechanical energy?

Kinetic energy is energy that is in motion, thats all I remember

Mechanical energy is a form of energy, it represents the energy that is possessed by a mechanical system of device due to its motion or position. Stated differently, mechanical energy is the ability of an object to do work. Mechanical energy can be either kinetic (energy in motion) or potential (energy that is stored)

Alkaline earth metals are found in group 2 of the periodic table.