What is calcium + chlorine when doing ionic bonds

What must happen before a body cell can begin mitotic cell division

Aroller coaster car is traveling down a track at 22 m/s. the car has a mass of 2000 kg. what is the kinetic energy of the car? a) 22,000 j b) 968,000 j c) 484,000 j d) 44,000 j

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.