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picture1_Activity Ppt 68404 | 5f1f6bd35aea95e66337b4a4d5023916


 137x       Filetype PPTX       File size 0.27 MB       Source: www.thelinkacademy.org.uk


File: Activity Ppt 68404 | 5f1f6bd35aea95e66337b4a4d5023916
progress indicators good progress state the 3 definitions of half life find the half life of a substance from a graph plot a graph showing the decay of a sample ...

icon picture PPTX Filetype Power Point PPTX | Posted on 28 Aug 2022 | 3 years ago
Partial capture of text on file.
            Progress indicators
      GOOD PROGRESS:
      - State the 3 definitions of half-life
      - Find the half-life of a substance from a graph / Plot a 
      graph showing the decay of a sample and use it to 
      determine half life.
      OUTSTANDING PROGRESS:
      - Calculate the changes in count rate or nuclei remaining.
  Isotopes
     A
          • Atoms of the same element but a different 
      X    number of neutrons than protons
     Z    • The number of protons and neutrons is 
           indicated by A which is also the mass 
           number
     Activity vs Count Rate
                                                               3D
                                        Activity
  Count Rate is the 
  number of counts per                Radioactive
  second from a Geiger                  Source
  Counter at the                                                  Count Rate
  imaginary surface of 
  the cone of the sphere 
  projected out from the                                        2D
  centre of the 
  radioactive source. 
  Calculating Activity and Count Rate 
  of an Un-Stable Radioactive Isotope.
       Activity:
       Number of atoms that decay per second from the nucleus
         Activity = Number of Atoms that Decayed
                                                 Time (s)
       Count Rate:
       Number of counts per second from a Geiger Counter
         Count Rate = Number of counts from Geiger Counter
                                                               Time (s)
       Count Rate over Time
                            200
                            180
                            160
                         e  140
                         t
                         a
                         R  120
                          
                         t
                         n
                         u  100
                         o
                         C                                                          Example radioisotope
                             80
                             60
                             40
                             20
                              0
                               0   15  30 45 60 75 90 105 120 135 150
                                               Time (mins)
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...Progress indicators good state the definitions of half life find a substance from graph plot showing decay sample and use it to determine outstanding calculate changes in count rate or nuclei remaining isotopes atoms same element but different x number neutrons than protons z is indicated by which also mass activity vs d counts per radioactive second geiger source counter at imaginary surface cone sphere projected out centre calculating an un stable isotope that nucleus decayed time s over e t r n u o c example radioisotope mins...

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