You don’t have any charge outside of the nuclear
Number of photons can be calculated by dividing the needed energy by the energy per photon.
The minimum energy needed is given as 2 x 10^-17 joules
Energy per photon = hc / lambda where h is planck's constant, c is the speed of light and lambda is the wavelength
Energy per photon = (<span>6.626 x 10^-34 x 3 x 10^8) / (475 x 10^-9)
= 4.18 x 10^-19 J
number of photons = (2 x 10^-17) / (4.18 x 10^-19)
= 47.79 photons which is approximately 48 photons</span>
C) 179 amu. Hf or hafnium is an element having an atomic number of 72. It is a transition metal <span>with at least </span>34 isotopes, five of these stable isotopes have an atomic mass ranging from of 176 amu to 180 amu. Getting the average atomic mass requires knowledge on the % abundance of the stable isotopes, and then getting the weighted average.
Option a. a type of resistant wire
a revolving structure in an electric motor or generator, wound with the coils that carry the current.