Discover the Mass Number of Element X

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To find the mass number of element X, calculate the weighted average of its isotopes based on their natural abundance. The isotopes are 108X, which makes up 65.8%, and 114X, which accounts for 34.2%. The formula used is ((65.8 * 108) + (34.2 * 114)) / 100, resulting in an average mass number of approximately 110.05. This method effectively combines the masses of the isotopes with their respective percentages. Understanding this calculation is crucial for determining the mass number of newly discovered elements.
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how would you set this up to solve this problem

A newly discovered element occurs naturally as the two isotopes: 108X and 114X. In nature 65.8 % of is the isotope 108X and the remaining percentage is 114X. What is the mass number for element X.
 
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hockeyfghts5 said:
how would you set this up to solve this problem

A newly discovered element occurs naturally as the two isotopes: 108X and 114X. In nature 65.8 % of is the isotope 108X and the remaining percentage is 114X. What is the mass number for element X.

Well basically when giving the mass number for an element, in your case X you take the average of the masses, which obviously changes with the percentages of the respective ones, in this case

(( 65.8 * 108 ) + ( 34.2 * 114 )) / 100 = It's average mass number which turns out to be 110.05!

Sorry if I can't explain it that well, but basically, you take the mass of each one * the percentage of it, add them all up, and divide it by 100. If you're still struggling pm me
 
thanks
 
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