A substance that has more than 2 atoms bonded together
Atomic number = 127 – 53=74 neutrons
CHA is not an example of a molecule because there is no element represented by “A”
<span>Associating the need of surgeon in practice , we write a software of human body biocycle law . this software can provide a science reliance in the time selection of surgical operation plan to the main surgeon
(just an example^)</span>
