Which of the following involves the emission of a particle that has the same mass of an electron with a positive charge. a.
alpha decay
c.
positron emission
b.
beta decay
d.
nuclear forces

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=