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What information is needed to calculate the average atomic mass of an element?

a. the charge on each isotope
b. the number of protons in each isotope
c. the total amount of the element in the sample or in nature
d. the relative abundance of its isotopes

User Zauker
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2 Answers

1 vote
b) the number of protons in each isotope.
User ObiWanKenobi
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Answer:

What information is needed to calculate the average atomic mass of an element?

a. the relative abundance of its isotopes.

Calculate the average atomic mass of a sample of a mixture of argon (Ar). The mixture is 90% argon-36 and 10% argon-38. Argon-36 has an atomic mass of 35.968 amu. Argon-38 has an atomic mass of 37.962 amu.

a. 36.167 amu.

A student wants to calculate the average atomic mass of neon in nature. Information about neon is in the table below. Which of the following is a correct way for the student to set up the calculation?

a. (19.992 amu x .9048) + (20.993 amu x .0027) + (21.991 amu x .0925)

There are three stable forms of neon: neon-20, neon-21, and neon-22. Which statement is true?

a. Their atomic masses differ.

Beryllium has an atomic number of 4. How many neutrons does the isotope beryllium-9 have?

a. 5

Step-by-step explanation:

I hope this helps! :)

User LeafGlowPath
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