easy-watermark domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /home/u223937191/domains/scienceworksheets.co.uk/public_html/wp-includes/functions.php on line 6170Practice Questions
1.State two ways that radiation can be detected
Photographic film
Geiger Muller tubeÂ
2. Define the term activity
Activity is the rate at which a source of unstable nuclei decays.
3. Explain the meaning of the unit Becquerel
1 Becquerel means one nucleus decays per second.
4. A source has an activity of 7500Bq. Calculate how many nuclei decay over 2 minutes.
2 minutes = 120 seconds
7500Bq x 120 seconds = 900000 nuclei decay
5. A geiger counter records an average count rate of 3.5 counts per second. Calculate the count rate per minute.
60 seconds in one minute
3.5 x 60 = 210
Absorption and Emission of EM Radiation
JJ Thomson and Plum pudding model
Ernest Rutherford and the Nuclear Model
Niels Bohr changing the Nuclear Model
Discovering the Proton and Neutron
Measuring radiation from radioactivity
Radiation types and properties
Random nature of radioactive decay
Radioactive contamination or irradiation
Hazards of contamination and irradiation
Studies on the effects of radiation on humans