16.

The half-life of Calcium-47 is 3.91 x 10⁵ seconds. A sample contains 4.11 x 10¹⁶ nuclei. What is the decay constant for this decay?

	2.75 x 10-6 s-1
	3.46 x 10-6 s-1
	3.37 x 10-6 s-1
	1.77 x 10-6 s-1

17.

The energy levels for a Bohr atom are shown below.

If an electron moves from n = 5 to n = 1, what wavelength of light is emitted? (h = 6.626 x 10^-34, 1 eV = 1.6 x 10^-19 J)

	434 nm
	95 nm
	1281 nm
	4008 nm

18.

After two half-lives, how much of the original sample would remain?

	50%
	12.5%
	6.25%
	25%

19.

Given the atomic mass of Beryllium-11 is 11.021658 u, what is the nuclear binding energy of Beryllium-11? (m_proton = 1.0078251, m_neutron = 1.0086649, c² = 931.5 eV/u)

	959 eV
	65 eV
	63 eV
	1004 eV

20.

What is the mass defect?

21.

Which of the following can be used to describe nuclear fission? Check all that apply.

	energy is released as light
	used in nuclear reactors
	used in atomic bombs
	not very efficient

22.

Describe atomic spectra using the terms of electron shells, emission, absorption, and wavelengths.

23.

How would you describe half-life?

24.

Which nuclear reaction starts with a larger nucleus and ends with two smaller nuclei?

	nuclear fission
	nuclear fusion

25.

What is the rest energy of a neutron? (c = 2.9979 x 10⁹ m/s, m_n = 1.6749 x 10^-27)

	8.18 x 10-14 J
	1.5032 x 10-10 J
	2.73 x 10-22 J
	1.5053 x 10-10 J

26.

What is the difference between Einstein's Special and General Theory of Relativity?

27.

Which of the following are true regarding beta minus decay? (Select all that apply)

	emits an antineutrino
	emits a neutrino
	the nucleus emits a high-energy positron
	the nucleus emits a high-energy electron

28.

The color blue has a wavelength of 475 nm. What is the energy of a blue photon? (h = 6.626 x 10^-34, 1 eV = 1.6 x 10^-19 J)

	7.89 eV
	4.56 eV
	1.98 eV
	2.61 eV

29.

Which of the following relativistic statements seems to contradict what we know in classical physics?

	The laws of physics are the same in all frames of reference that are moving uniformly.
	A beam of light that travels parallel to the aether would take longer than the beam that travels perpendicularly to the aether.
	The speed of light is constant and is independent of the motion of the source or the observer.
	Waves had to have some medium to travel through.

30.

Which scientists influenced the progression of the atomic model? (Check all that apply)

	Thomson
	Rutherford
	Dalton
	Bohr