Class Notes (836,580)
Canada (509,856)
Chemistry (600)
CHM135H1 (333)
Lecture

Notes taken during lecture

3 Pages
122 Views
Unlock Document

Department
Chemistry
Course
CHM135H1
Professor
Kris Quinlan
Semester
Summer

Description
LECTURE 3 Chapters 5 Slide Number Notes 11 EX. - binding energy = 7.21 x 10^-19 J - E of photon > or = 7.21 x 10^-19 J - Longest wavelength = 6.63x10^-34 Js (3.00x10^8 ms) 7.21 x 10 ^-19 J = 2.76 x 10^-7 m = 276 nm - Will light with 290 nm eject electrons? NO - This is because increasing wavelength = decreasing frequency - 276nm is the longest wavelength that will eject electrons - below this threshold, no electrons ejected - increasing wavelength is decreasing energy - energy of photon = binding energy + kinetic energy of electron = 7.21x10^-19 J + 2.5 x 10^-19J = 9.7x10^-19J - v = Eh = 9.7x10^-19 J 6.676x10^-34Js = 1.5x10^15s - wavelength = cv = 3.00x10^8 ms 1.5 x 10^15s = =210nm 13 - monochromatic = one colour - energy needed to eject energy from Zn > than for Na therefore A wrong - same number of electrons ejected from both metals because same intensity of light shone for both therefore B and C wrong - zinc has a higher threshold frequency, therefore there is less kinetic energy therefore
More Less

Related notes for CHM135H1

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit