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:
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