When a bound electron moves to location further from the nucleus, which of the following are true? energy of electron increases because it takes energy input to separate positive and negative charges, and there is a decrease in the electrostatic potential energy of the electron energy of electron increases because it takes energy input to separate positive and negative charges, and there is an increase in the electrostatic potential energy of the electron energy of electron decreases because energy is released as positive and negative charges are separated, and there is a decrease in electrostatic potential energy of electron since it is now further away

If you are shining light on a Pt electrode and no electrons are emitted, what do you have to do to generate electrons? Decrease the wavelength of the light to increase the energy of the photons to emit electrons Electrons can not be emitted from Pt because like any other noble metal it does not react, even under light exposure (unlike other metals, e.g. Na, Sr or Cu) Increase the wavelength of the light to increase the energy of the photons to emit electrons Wait longer times or increase the intensity of the light source, since the energy of the absorbed light is not high enough to emit electrons from Pt surface

17) How many eV's are created when a frequency of 8.77 e 15 is made from a collapsed electron_ f I be-19

10. An electron has been placed at the origin. The grid spacing is 1 Angstrom per small square this time. Now you have a nucleus with 18 protons at x = 2.1 Angstroms on the x-axis. How much work would it take to bring in ANOTHER nucleus with 14 protons from 1 m away and place it at y = 8.0 Angstroms on the y-axis?     165.2 eV     413.1 eV     -25.2 eV     438.2 eV

10) Now you have a nucleus with 13 protons at x = 6.2 Angstroms on the x-axis. How much work would it take to bring in ANOTHER nucleus with 7 protons from 1 m away and place it at y = 8.0 Angstroms on the y-axis?     70.0 eV     116.7 eV     -12.6 eV     129.3 eV

2. The atomic nucleus may be a sphere of a positive charge, with a diameter very much less than that of the atom. Discuss the experimental evidence which supports this view.

An electron with 2.2 eVeV of kinetic energy collides with an atom whose energy-level diagram is shown in (Figure 1).   The electron kicks the atom into an excited state. What is the electron's kinetic energy after the collision? ANSWER IN EV