5. An unknown element is found with the following isotopid percent abundance: X-20 is found at an abundance of 90.50%, X-21 is found at an abundance of 27% and X-22 is found at an abundance of 9.23%. Given this information find the average atomic mass of the elementi show your work for full credit :

pla·gia·rism

/ˈplājəˌrizəm/

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noun

the practice of taking someone else's work or ideas and passing them off as one's own.

explanation:

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.