Radiation
What is the Unit for radiation dose?
Sievert (Sv)
(Measures the biological effects of ionizing radiation on human tissue)
What is an isotope?
A variant of a chemical element that has the same number of protons but a different number of neutrons in the nucleus.
What is the definition of half-life in the context of radioactive decay?
The time required for half of the radioactive atoms in a sample to decay into a different isotope or element
Which radioactive isotope is commonly used in smoke detectors?
Americium-241
Who discovered Radium?
Marie Curie and Pierre Curie
Which element has the most stable isotopes?
Tin (Sn)
Which element has a half-life of about 4.5 billion years?
Uranium-238
What type of radiation is used in medical imaging techniques like X-rays?
Ionizing radiation
What type of radiation are alpha particles?
Ionizing radiation
What is the difference between stable and unstable isotopes?
Stable isotopes are not radioactive and unstable isotopes are radioactive
What is the half-life of carbon-14?
5,730 years
How is radiation used in the treatment of cancer?
High doses of ionizing radiation to kill cancer cells by damaging their DNA
What is radioactive decay?
Process by which unstable atomic nuclei lose energy by emitting radiation.
Which isotope of hydrogen is known as deuterium?
Hydrogen -2
What is the half-life of uranium-238?
4.5 billion years
Which radioactive element is used in some types of nuclear batteries for pacemakers?
Plutonium-238
When was the first atomic bomb tested?
July 16, 1945
What is the common use of carbon-14 in archaeology?
Radiocarbon dating
How many half-lives does it take for a radioactive substance to reduce to 1/8 of its original amount?
What is the purpose of using gamma radiation in food irradiation?
To kill bacteria