Increased pressure to stop the movement. The brake reduces the acceleration of the engine. The brake absorbs energy at the wheels when it is applied to moving vehicles. It applies a counter torque to the engine. The friction force created by the break stops the vehicle.
First the atomic number identify's the chemical element. For example, if the atom is nuclear, the atomic number equals to the electrons. So, the atomic number identifies the properties of the atom and/or which the atom belongs to.