DP Chemistry (first assessment 2025)

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Question SPM.1A.HL.TZ0.3

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Date May Specimen-2023 Marks available [Maximum mark: 1] Reference code SPM.1A.HL.TZ0.3
Level HL Paper 1A Time zone TZ0
Command term Question number 3 Adapted from N/A
3.
[Maximum mark: 1]
SPM.1A.HL.TZ0.3

The table lists successive ionization energies of an element Z.

Ionization number 1st 2nd 3rd 4th 5th 6th
Ionization energy / kJ mol−1 577.54 1816.68 2744.78 11 577.5 14 841.9 18 379.0


Which is the formula of the stable oxide of the element Z?


A.  Z2O

B.  ZO

C.  Z2O3

D.  ZO2

[1]

Markscheme

C