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Question 17N.3.sl.TZ0.14b

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Date November 2017 Marks available [Maximum mark: 1] Reference code 17N.3.sl.TZ0.14b
Level sl Paper 3 Time zone TZ0
Command term Estimate Question number b Adapted from N/A
b.
[Maximum mark: 1]
17N.3.sl.TZ0.14b

In the 20th Century, both fission and fusion were considered as sources of energy but fusion was economically and technically unattainable.

(b)

The amount of 228Ac in a sample decreases to one eighth ( 1 8 ) of its original value in about 18 hours due to β-decay. Estimate the half-life of 228Ac.

[1]

Markscheme

6 «hours»

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