NEED HELP ASAP! Cesium-131 is the latest tool of nuclear medicine. It is used to treat malignant tumors by implanting Cs-131 directly into the tumor site. Its first-order half-life is 9.7 days. If a patient is implanted with 20.0 mg of Cs-131, how long will it take for 22% of the isotope to remain in his system?

i have no clue hope you find the answer

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.