Sample A has 12 protons, 13 neutrons and 12 electrons. Sample B has 12 protons, 12 neutrons and 10 electrons. Are these two samples isotopes of one another? Explain how you know
Are either of these two samples ions? Which one(s)? Explain how you know

it's a b and

you'd use the equation that establishes a relationship between  energy  and  wavelength, which looks like this

e=h⋅cλ, where

λ  - the wavelength of the photon; c  - the speed of light, usually given as  3⋅108m/s; h  -  planck's constant, equal to  6.626⋅10−34j s

plug the value you were given for the energy of the photon in the above equation to get the wavelength

e=h⋅cλ⇒λ=h⋅ce

λ=6.626⋅10−34js⋅3⋅108ms−1.257⋅10−24j=1.581⋅10−1m