Question 3
Question 3 of 40
Question image for Q3
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
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
1.1. Particles in the atom and atom...

describe the distribution of mass and charge within an atom