Question 1
Using the figure below, categorize electromagnetic radiation with an energy of 6.7 x 10
-18 J/photon.
◦ Gamma rays
◦ X rays
◦ Ultraviolet
◦ Infrared
◦ Microwave
Question 2
What is the binding energy (in J/mol or kJ/mol) of an electron in a metal whose threshold frequency for photoelectrons is 2.50 × 10
14 /s?
◦ 2.75 × 10
–43 J/mol
◦ 1.66 × 10
–19 J/mol
◦ 1.20 × 10
–6 J/mol
◦ 99.7 kJ/mol
◦ 7.22 × 10
17 kJ/mol