What is radioactivity? Ionizing radiation What is a Geiger counter? How a Geiger counter works Who invented the Geiger counter? Can you make your own? Find out moreWhat is radioactivity?There are several different types of radiation, caused by different processes. Cosmic rays, for example, arriv...
Describe the importance of radioactivity in medicine. Give an example of how radioactivity is used to diagnose and treat diseases that affect patients. What is standardization in chemistry and what is its importance? Explain why a model of the...
Define isotopes and explain what causes some isotopes to be radioactive and how people may be helped or harmed by radioactivity. What is the relation of all isotopes? What is an uncompensated ion? What charge ion would the atom Calcium (Ca) make, and why?
Filters were dissolved in 2 mL of scintillation solution (Emulsifierplus, PerkinElmer, Waltham, MA, USA) and vor- texed before radioactivity was determined by liquid scintillation counting (Tri-Carb 2800TR liquid scintillation ™analyzer, PerkinElmer). Samples were normalized to 106 cells by cell ...
To complicate things a bit more, we sometimes find atoms of a chemical element that are a bit different to what we expect. Take carbon, for example. The ordinary carbon we find in the world around us is sometimes called carbon-12. It has six protons, six electrons, and six neutrons, ...
The first discovery that had to do with what goes on in nuclei was radioactivity, which is caused by particles being shot out of the nucleus. It was known that a great deal of energy is locked up in the nucleus, but, until just before the outbreak of the Second World War, there was...
FEMALE STUDENT: Yes, um, Professor Harrison? You were saying that the periodic table is predictive?What exactly does that mean?I mean, I understand how it organizes the elements, but … where’s the prediction? MALE PROFESSOR: OK, let's look at our periodic table again.OK - it groups ...
1839: French physicist Alexandre-Edmond Becquerel (father of radioactivity pioneer Henri Becquerel) discovers some metals are photoelectric: they produce electricity when exposed to light. 1873: English engineer Willoughby Smith discovers that selenium is a particularly effective photoconductor (it's later ...
Using two unconnected loops of water and the heat exchanger helps to keep water contaminated with radioactivity safely contained in one place and well away from most of the equipment in the plant. The steam from the heat exchanger is piped to a turbine. As the steam blows past the turbine'...