Nuclear structure ppt-People's Education Edition elective (1-2) courseware
October 04 10:15:41, 2020
Cardboard Tube Packaging, Tube Packaging, Paper Tube Packaging, Cosmetic Packaging Tube Zenghui Paper Package Industry and Trading Company , https://www.packagebox.nlElective Edition of People's Education Edition (1-2) "Structure of Atomic Nucleus" ppt In 1896, French physicist Becquerel discovered that uranium and uranium-bearing minerals can emit invisible rays, which can penetrate black paper for photography The film is light sensitive, and the nature of the material emitting radiation is called radioactivity. The elements with radioactivity are called radioactive elements. The spontaneous emission of elements is called natural radiation.