DP Chemistry (first assessment 2025)

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Question 19N.1A.HL.TZ0.5

Date	November 2019	Marks available	[Maximum mark: 1]	Reference code	19N.1A.HL.TZ0.5
Level	HL	Paper	1A	Time zone	TZ0
Command term	Interpret	Question number	5	Adapted from	N/A

5.

[Maximum mark: 1]

19N.1A.HL.TZ0.5

Which shows the first ionization energies of successive elements across period 2, from left to right?

[1]

Markscheme

C

Syllabus sections

Tools » Tool 3: Mathematics

Structure 1. Models of the particulate nature of matter » Structure 1.3—Electron configurations » Structure 1.3.6—In an emission spectrum, the limit of convergence at higher frequency corresponds to ionization. Explain the trends and discontinuities in first ionization energy (IE) across a period and down a group. Calculate the value of the first IE from spectral data that gives the wavelength or frequency of the convergence limit.