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Chapter 6 Review

1. What is the energy of a photon whos frequecy is 3.0 x 1012 Hz? ( The numerical calue of h is 6.6 x 10-34 J/Hz.)

2. Calculate the average atomic mass of thailium if 29.5% of the naturally occurring atoms of thallium have a mass number of 203 and 70.5% have a mass number of 205.

3. What is the frequency of a wave that has a wavelength of 5.0 x 10-34 m and a velocit of 3.0 x 108 m/s?

4. The nucleus of the isoptope of an element has 9 protons and 10 neutron. Determine the atomic number and the mass number of the element.

5. Naturally occurring oxygen is 99.76% oxygen-16. In a 32-gram sample of oxygen would be made up of oxygen-17 and oxygen- 18 isotopes?

If you have any questions, please email Ms. Cummings