Energy Levels: A neutral boron atom has 5 electrons, but in this case all but one of its electrons have been knocked off. How much energy (in electron-volts) is needed to remove the last electron?
Fill in the blank(s) with the appropriate word(s).
340 eV
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The hottest star in the Orion Nebula ____________hydrogen gas and makes it _____________
a. ionizes; glow b. neutralizse; glow c. ionizes; swallow the star
The carbon in our bodies was formed in nuclear reactions in long-dead stars. How much energy was released when the right number of 4He nuclei combined to make 12C?
The mass of 4He is 3728.40 MeV/c2 and the mass of 12C is 11,177.93 MeV/c2. A) 7.27 MeV B) 372 MeV C) 8.42 MeV D) 2.11 MeV
Answer the following statement(s) true (T) or false (F)
Einstein’s photon model is consistent with the results of two-slit interference experiments involving light.
While watching a star, you see it moves 15 degrees across the sky. How long have you been watching it?
A) 1 hour B) 3 hours C) 15 minutes D) 15 seconds E) 1 minute