Find the block labeled ? in Figure 2. What is its atomic number? How many valence electrons does it have? Which of the elements
shown in Figure 2 will it most resemble?
2 answers:
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Answer : The change in energy of an atom is,
Solution : Given,
Wavelength of the photon =
Formula used :
where,
E = energy of an atom
h = Planck’s constant =
c = speed of light =
= wavelength of photon
Now put all the given values in the above formula, we get the energy of an atom.
Therefore, the change in energy of an atom is,