2012-11-29
2012 SPM Chemistry (Paper1) Answer
1.B 2.A 3.A 4.A 5.C 6.D 7.C 8.D 9.A 10.D
11.B 12.A 13.D 14.D 15.A 16.C 17.B 18.A 19.A 20.B
21.C 22.C 23.B 24.A 25.C 26.C 27.D 28.D 29.D 30.B
31.B 32.B 33.B 34.D 35.B 36.C 37.C 38.A 39.C 40.C
41.A 42.A 43.B 44.D 45.D 46.D 47.C 48.A 49.A 50.D
2012-11-27
Common Sources of Radiation Used in Malaysia
Medical Field
Widely used in Nuclear Medicine, radiology & Radiotherapy, for diagnosis purposes & medical research.
Common radioisotopes used : Technitium-99, Cobalt-60, Cesium-137, Iodine & Radium 226
In Industry
Used in industrial application such as gauging, oil logging, industrial radiography, analyytical purposes for minerals & soil samples, quality assuarance for electronic componenets & tracer
technique applications.
Common radioisotopes used : Americium-241, Berryllium-9, Cobalt-60, Cesium-137, Stronitium-90, Iridium-192, Argon-41, Kripton-85, Sodium-24.
In Research
Mostly for research activities in agriculture, medicine & nuclear sciences. Common radioisotopes used : Phosphorus-32, Technitium-99, Cobalt-60, Cesium-137, Gold-198.
Source : Atomic energy Licensing Board, Malaysia
2012-11-21
Crystallization of Lead(II) Iodide
- What is the special characteristics of lead(II) iodide you observe from the video above?
- What are the reactants used to prepare lead(II) iodide?
Naming of Carbon Compounds
Are you able to identify names of 10 different carbon compounds?
It's a trial version using Wordle.