Chemistry 5070 · O Level · Atomic structure and the Periodic Table

Atomic structure and the Periodic Table — practice question

Select from the list of elements below to respond to the questions that follow. aluminium argon carbon copper iodine iron lead magnesium nitrogen oxygen sulfur Each element may be used once, more than once, or not used at all.
(a)[1]

Which element has an ion that, in aqueous solution, gives a red-brown precipitate with aqueous sodium hydroxide?

(b)[1]

Which element has an atom with an electronic configuration containing only five occupied electron shells?

(c)[1]

Which element has an oxide that decolourises acidified potassium manganate(VII)?

(d)[1]

Which element has a sulfate that is insoluble in water?

(e)[1]

Which element supplies an inert atmosphere for the extraction of reactive metals?

(f)[1]

Which element forms ammonia when warmed with an aqueous mixture of sodium nitrate and sodium hydroxide?

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “iron (Fe)” …

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