A-Level H2 Chemistry Practice Questions - Singapore-Cambridge GCE A-Level Higher 2 (H2) Chemistry (Syllabus 9729) Exam

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An atom of an element has the electronic configuration 1s2 2s2 2p6 3s2 3p3. Which element is this, and to which group of the Periodic Table does it belong?

Aluminium, Group 13 Sulfur, Group 16 Nitrogen, Group 15 Phosphorus, Group 15

Correct Answer:

Phosphorus, Group 15

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