Revision notes history of atomic structure models isotopes definition explained working out numbers of electrons protons neutrons revising for a level aqa gcse chemistry a level edexcel gcse chemistry ocr gcse 21st century science a level ocr gcse gateway science gcse 91 chemistry exams.
The older a sample of a radioactive material the less radioactive it is the decrease in radioactivity follows a characteristic pattern shown in the graph or decay curve the y axis can represent the radioisotope left or the measured radioactivity.
radioactivity all links to revision topics for this section.
This page contains the gcse aqa chemistry atomic structure questions and their answers for revision and understanding atomic structure.
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Radioactivity radiodating what is radiodating the halflife of a radioisotope can be used to measure the age of things the method is called radiodating radiodating can be used to measure the age of rocks see below and carbon dating can be used to date archaeological specimens using uranium238 to date rock some rocks contain uranium238 which is radioactive and.
The chemistry nobel prize 2013 for what work research was the prize awarded chemistry is one of category of nobel prize given to chemists who have dedicated in chemistry science.
research highlights of nature research journals oct 4 plant science warmer springs may not lead to greener grass nature oct 4 medical research latent hiv infection targeted in monkeys nature oct 3.
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