# Question: What Is The Maximum Wavelength Of Light That Can Remove An Electron From An Atom In Lithium Metal?

## How do you calculate the wavelength needed to remove an electron?

If a photon has enough energy, it can completely remove an electron from an atom or molecule. In this video, we’ll use the light equations (E = h and c = ) to calculate the longest photon wavelength capable of removing an electron from a single atom of silver.

## What is the maximum wavelength of light that is needed to free an electron from the surface of potassium metal?

You can thus say that in order for an electron to be ejected from the surface of potassium, the incoming photon must have a maximum wavelength of 543 nm. If the wavelength of the incoming photon is longer than this value, then you won’t see an emission of electrons from the surface of the metal.

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## What is the maximum wavelength of light required to remove an electron from iron?

The maximum wavelength is 2.76×107 m.

## What is the maximum wavelength of light capable of doing this?

The maximum wavelength of light capable of doing this is λ = 574.4 nm.

## What are the 7 wavelengths?

The EM spectrum is generally divided into seven regions, in order of decreasing wavelength and increasing energy and frequency. The common designations are: radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma rays.

## Which Colour has more wavelength?

In the visible spectrum red to violet, red has the highest wavelength [650 nm] as well as the lowest frequency.

## What is the minimum frequency required to remove an electron from metallic potassium?

The threshold frequency for potassium metal is: This means that light with a minimum frequency of 5.584 × 1014 Hz is needed to remove an electron from the potassium metal. Blue light is above this frequency which means it will trigger the photoelectric effect.

## What is the threshold frequency of potassium?

The threshold frequency of potassium is 3 × 1014 Hz.

## What is the threshold frequency?

: the minimum frequency of radiation that will produce a photoelectric effect.

## What is the energy required to remove an electron?

Ionization energy, also called ionization potential, in chemistry and physics, the amount of energy required to remove an electron from an isolated atom or molecule.

## What is the minimum frequency of light needed to remove an electron from chromium?

In discussions of the photoelectric effect, the minimum energy needed to remove an electron from the metal is called the threshold energy and is a characteristic of the metal. For example, chromium, Cr, will emit electrons when the wavelength of the radiation is 284 nm or less.

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## What is the longest wavelength of light that will cause the ejection of electrons?

The longest wavelength of light that will cause an electron to be emitted from a metal is 520 nm.

## How do you determine the longest wavelength?

Red has the longest wavelength and violet has the shortest wavelength. When all the waves are seen together, they make white light.

## How do you find the shortest and longest wavelength?

2. Calculate the longest and shortest wavelengths of light emitted by electrons in the hydrogen atom that begin in the n = 6 state, and then fall to states with smaller values of n. For longest lambda, n = 6 –> n = 5. For shortest lambda, n = 6 –> n = 1.

## What is the shortest wavelength of light that can be emitted by a hydrogen atom?

This is also known as the Hα line of atomic hydrogen and is bight red (Figure 1.4. 4). Since 1˜ν=λ in units of cm, this converts to 364 nm as the shortest wavelength possible for the Balmer series.