**Calculate the energy required to remove 1 electron:**

$\mathbf{E}\mathbf{=}\frac{\mathbf{208}\mathbf{.}\mathbf{4}\mathbf{}\overline{)\mathbf{kJ}}}{\overline{)\mathbf{mol}\mathbf{}\mathbf{electron}}}\mathbf{\times}\frac{{\mathbf{10}}^{\mathbf{3}}\mathbf{}\mathbf{J}}{\mathbf{1}\mathbf{}\overline{)\mathbf{kJ}}}\mathbf{\times}\frac{\mathbf{1}\mathbf{}\overline{)\mathbf{mol}\mathbf{}\mathbf{electro}}\mathbf{n}}{\mathbf{6}\mathbf{.}\mathbf{022}\mathbf{\times}{\mathbf{10}}^{\mathbf{23}}\mathbf{}\mathbf{electron}}$

**E = 3.461****×****10 ^{‒19} J/electron**

**3.461****×****10 ^{‒19} J of **energy is required to remove a single electron from an atom on the surface of solid rubidium.

$\overline{)\mathbf{E}\mathbf{=}\mathbf{h\nu}}\phantom{\rule{0ex}{0ex}}\frac{\mathbf{c}}{\mathbf{\lambda}}\mathbf{=}\frac{\overline{)\mathbf{\lambda}}\mathbf{\xb7}\mathbf{\nu}}{\overline{)\mathbf{\lambda}}}\phantom{\rule{0ex}{0ex}}\mathbf{\nu}\mathbf{=}\frac{\mathbf{c}}{\mathbf{\lambda}}\phantom{\rule{0ex}{0ex}}\overline{)\mathbf{E}\mathbf{=}\frac{\mathbf{hc}}{\mathbf{\lambda}}}$

It takes 208.4 kJ of energy to remove 1 mole of electrons from an atom on the surface of rubidium metal. (1 mol electrons = 6.022 x 10^{23} electrons.) How much energy does it take to remove a single electron from an atom on the surface of solid rubidium? What is the maximum wavelength of light capable of doing this?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Photoelectric Effect concept. You can view video lessons to learn Photoelectric Effect. Or if you need more Photoelectric Effect practice, you can also practice Photoelectric Effect practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Poehlmann & Waymouth's class at STANFORD.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition. You can also practice Chemistry: An Atoms First Approach - Zumdahl Atoms 1st 2nd Edition practice problems.