Nuclear medicine uses radiation to provide diagnostic information about the functioning of a person's specific organs, or to treat them. Diagnostic procedures using radioisotopes are now routine.
Radiotherapy can be used to treat some medical conditions, especially cancer, using radiation to weaken or destroy particular targeted cells.
Over 40 million nuclear medicine procedures are performed each year, and demand for radioisotopes is increasing at up to 5% annually.
Sterilization of medical equipment is also an important use of radioisotopes.
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By looking at it and if it is making a single movement it is moving.
They help us understand the concept of evolution and they help us understand what our earth was like before and after pangea or the great continental drift
Answer:
A. 2-pentyne is the answer.
Stoichiometry is “quantitative relationship” among the “reactants” and the “products” in a “chemical reaction”.
<u>Explanation</u>:
In stoichiometry “stoicheion” means element and “metron” means measure in Greek. The stoichiometric calculation depends upon “stoichiometric coefficients” in a “chemical equation” which can be explained as the “number of moles” of each substance (reactants or products). Stoichiometric calculation is done as follows:
For example reaction between nitrogen and hydrogen to form ammonia as
Here stoichiometric coefficients show that “one molecule of nitrogen” reacts with “three molecules of hydrogen” to form “two molecules of ammonia”. Multiplying Avogadro number 
to no of molecules in equation:
Taking molar masses into consideration:
Hence balanced equation gives stoichiometric coefficients which gives proportion by moles.
