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Documents Unit 2 Notes – Radioactivity Mr Nelson Facts about the nucleus Radius = 10 -13 cm (0.0000000000001...

Slide 1 Slide 2 Unit 2 Notes – Radioactivity Mr Nelson Slide 3 Facts about the nucleus Radius = 10 -13 cm (0.0000000000001 cm) Radius = 1/100000 th of an atom Density =…

Documents Radioactivity 1 輻 射 Presented by Mr. Y. N. Chan LIU PO SHAN MEMORIAL COLLEGE.

Slide 1 Slide 2 Radioactivity 1 輻 射 Presented by Mr. Y. N. Chan LIU PO SHAN MEMORIAL COLLEGE Slide 3 History of Radioactivity In 1896, Becquerel noted that radiation…

Documents Origins of the universe. 1. The ‘Big Bang’ theory According to this theory our universe began...

Slide 1 Origins of the universe Slide 2 1. The ‘Big Bang’ theory According to this theory our universe began 13.7 billion years ago as a singularity. Prior to this there…