chemistry it one of important science in the modern world it have many supject like:atom,they made a big difference between ancient times and now talk about electron and photon and energy and one of the best supject about atom didn't know it like raduom and uranium this make a chemistry very useful for every
يمكنكم طرح اسئلتكم والعودة للمنصة من خلال البحث في جوجل عن: اسال المنهاج
