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Date	May 2015	Marks available	1	Reference code	15M.1.sl.TZ1.7
Level	SL	Paper	1	Time zone	TZ1
Command term		Question number	7	Adapted from	N/A

Question

What is the total number of valence electrons in ${\text{C}}{{\text{H}}_{\text{3}}}{\text{CO}}{{\text{O}}^ - }$ ?

A. 16

B. 22

C. 23

D. 24

Markscheme

Examiners report

[N/A]

Syllabus sections

Core » Topic 2: Atomic structure » 2.2 Electron configuration

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