If a substance is emitting radiation very slowly, what can you determine about its half-life.
a. it has a long half-life
b. it has a short half-life
c. it has no half life

You are given two vectors a⃗ =−3.00ι^ 5.00j^ and b⃗ =5.00ι^ 2.00j^. let the counterclockwise angles be positive.

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o