2016年5月24日火曜日

Pre-TOEFL reading, the very basic of nuclear physics - rewrite -

Answer the following questions in English using any resource including the material provided in class if necessary. Write the answer in the space below the question or fill in the brackets.

1.    What are the two materials that make up the nucleus of an atom?


2.    What circles around the nucleus of an atom?


3.    What corresponds to the atomic number and the name of the element with the number?


4.    What is the atomic weight?


5.    What are atoms which have the same number of protons but different numbers of neutrons, in other words, weigh differently?


6.    A heavy element such as uranium is unstable and naturally crumbles down to a lighter, stable element, (            ), atomic number 82. As it transforms, it emits radioactive rays and particles.


7.    What occurs when the nucleus of a heavy atom breaks down other than emission of helium nuclei or electrons?


8.    What is the time it takes half the original number of the atoms of an element to turn into something different and lose its property?


9.    What is the name of a machine that is used to meddle with the nucleus of an atom by smashing matters at a tremendous speed?


10.  (            ) atoms, which are artificial radio-isotopes, are markers used to track the whereabouts of elements in a phenomenon that cannot be directly observed like the starch production in a plant. In this case, the process is observed by using CO2 which contains radioactive carbon isotopes.



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