Number of sig figs for 1.23

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Kajal Patel 3J
Posts: 20
Joined: Fri Sep 25, 2015 3:00 am

Number of sig figs for 1.23

Postby Kajal Patel 3J » Fri Oct 02, 2015 10:02 pm

1.23: The y-ray photons emitted by the nuclear decay of a technetium-99 atom used in radiopharmaceuticals have an energy of 140.511keV. Calculate the wavelength of these y-rays.
For this question I assumed that the answer should have 6 sig figs because the energy given in the problem has 6 sig figs, but the solutions manual has an answer with 5 sig figs. Which is the correct number?

Sonia Perez 1G
Posts: 29
Joined: Fri Sep 25, 2015 3:00 am

Re: Number of sig figs for 1.23

Postby Sonia Perez 1G » Fri Oct 02, 2015 10:11 pm

The answer should have 6 significant figures.


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