Question 1
Question 1 of 40
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Periodic Table
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Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
22. Analytical techniques
22.2. Mass spectrometry

calculate the relative atomic mass of an element given the relative abundances of its isotopes, or its mass spectrum

2. Atoms, molecules and s...
2.1. Relative masses of atoms and m...

define relative atomic mass, \(A_r\), relative isotopic mass, relative molecular mass, \(M_r\) and relative formula mass in terms of the unified atomic mass unit

1. Atomic structure
1.2. Isotopes

state that and explain why isotopes of the same element have different physical properties, limited to mass and density