Multiple Choice
Which element is used as the standard for defining the atomic mass unit (amu)?
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2. Atoms & Elements
Atomic Mass
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What is the average atomic mass of platinum (Pt) as listed on the periodic table?
A
195.08
B
183.84
C
207.2
D
178.49
Verified step by step guidance1
Understand that the average atomic mass of an element listed on the periodic table is a weighted average of the masses of its naturally occurring isotopes, based on their relative abundances.
Recognize that the value given on the periodic table for platinum (Pt) is the experimentally determined average atomic mass, which accounts for all isotopes and their abundances.
Note that the average atomic mass is typically found directly on the periodic table and does not require calculation unless isotope data is provided.
Identify the correct average atomic mass of platinum from the given options by comparing them to the known standard value listed on the periodic table.
Select the value closest to the accepted average atomic mass of platinum, which is approximately 195.08 amu.
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