If an element forms a 3+ ion in which group of the periodic table would you expect to find it? A. 15
B. 5
C. 13
D. 2

true is the correct answer

hope i

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray

i need with 1.3.2 investigate cycling o2 and co2 apex

we need to see it

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