Question 12
Question 12 of 40
Question image for Q12
Periodic Table
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No letter options?
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
3. Stoichiometry
3.2. Relative masses of atoms and m...

Define relative molecular mass, ( M_r ), as the sum of the relative atomic masses. Relative formula mass, ( M_r ), will be used for ionic compounds

2. Atoms, elements and co...
2.3. Isotopes

Calculate the relative atomic mass of an element from the relative masses and abundances of its isotopes