DP Chemistry (last assessment 2024)

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Question 18M.3.hl.TZ1.15a

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.3.hl.TZ1.15a
Level hl Paper 3 Time zone TZ1
Command term Justify, State Question number a Adapted from N/A
a.
[Maximum mark: 1]
18M.3.hl.TZ1.15a

Photovoltaic cells are much less hazardous than nuclear fission.

(a)

Early photovoltaic cells were based on silicon containing traces of other elements. State the type of semiconductor produced by doping silicon with indium, In, giving a reason that refers to its electronic structure.

[1]

Markscheme

p-type AND has 3 «valence» electrons

OR

p-type AND fewer electrons «than silicon»

 

 

Do not accept “it is in group 3/13” as reason.

[1 mark]

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