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2017 O Level Chem P1 Q25 — Periodic Table / Structure and Bonding Solution

Periodic Table / Structure and Bonding 2017 O Level Pure Chemistry · Paper 1 · Q25

Question

The diagram shows part of the Periodic Table. Which row is correct? Question diagram

Question diagram

Question diagram (continued)

A
B
C
D

Correct answer: B

Video Solution

Explanation

Answer: B. From the grid, Y is in Group I, so Y reacts vigorously with water. W is hydrogen, shown in its own box at the top of the table; hydrogen can donate an electron to form \(\text{H}^{+}\) or share an electron in a covalent bond, so W can donate or share an electron.

This matches row B (W; Y). X is a non-metal that does not react with water in this way, and Z is an unreactive noble gas.

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