Question 4
Question 4 of 40
Question image for Q4
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, elements and co...
2.2. Atomic structure and the Perio...

Describe the structure of the atom as a central nucleus containing neutrons and protons surrounded by electrons in shells

6. Chemical reactions
6.4. Redox

Identify redox reactions by changes in oxidation number using: (a) the oxidation number of elements in their uncombined state is zero (b) the oxidation number of a monatomic ion is the same as the charge on the ion (c) the sum of the oxidation numbers in a compound is zero (d) the sum of the oxidation numbers in an ion is equal to the charge on the ion

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

Interpret and use symbols for atoms, e.g. ( ^{12}_{6}C ), and ions, e.g. ( ^{35}_{17}Cl^{-} )