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Elements: Binding Energy

Related Topics

Wize University Chemistry Textbook > Early Atomic Theory to Quantum Theory

The Photoelectric Effect

5 Activities

Wize University Chemistry Textbook > Early Atomic Theory to Quantum Theory

Heisenberg Uncertainty Principal

3 Activities

An element is bombarded with a beam of X-rays of wavelength 0.75664nm. Upon irradiation, electrons are ejected with a velocity of 2.35 x 107 m/s.

What is the binding energy for the element?
More The Photoelectric Effect Questions:
If a photon was able to remove an electron from a metal plate that had a binding energy of 2 x 10-20 J, what was the frequency of the wave?
If the answer has an exponent write it like this 1.23x10^4 (no spaces)
Work Function
The work function of metallic cesium is 3.36×10−19 J. What is the threshold wavelength of light required to emit electrons from the surface of metallic cesium?
Photoelectric Effect
The threshold wavelength for a neodymium (Nd) metal surface is 387 nm. What wavelength of light causes electrons to be ejected from the surface with a maximum kinetic energy of 1.473×10−18 J? (Choose the closest answer.)
Work Function
X-ray of frequency 1.53 ⋅\cdot 1016 Hz cause emission of electrons from a metal surface with a maximum kinetic energy of 1.313 ⋅\cdot 106 Jmol−1. Calculate the threshold frequency of the material.
Photoelectric effect: Threshold frequency
If we are told that a certain metal's threshold frequency to displace an electron is 9.12x1014Hz and we shine violet light (400nm) on the metal, would an electron be displaced?
Let's first write out our light equations so we can be reminded of how the variables are related:
E=hv c=λ(v)
An element is bombarded with a beam of X-rays of wavelength 0.75664 nm. Upon irradiation electrons are ejected with a velocity of 2.35 x 107 m/s.
Photoelectric effect: Work Function of Platinum
The binding energy for a material, sometimes know as the work function, can be found by irradiating a surface with a laser of sufficiently high energy and then measuring the kinetic energy of the ejected electrons. A researcher has found a new morphology of Platinum and is wondering if the work function has been modified. To test this the researcher irradiates the new form of Platinum with a UV-Laser with a wavelength of 125 nm and measures the kinetic energy of the electrons being ejected at 5.74 x 10-19 J. What is the work function of the new Platinum morphology? (1.60 x 10-19J = 1 eV)
Photoelectric effect: Binding Energy of Platinum
The binding energy for a material, sometimes known as the work function, can be found by irradiating a surface with a laser of sufficiently high energy and then measuring the kinetic energy of the ejected electrons. A researcher has found a new morphology of Platinum and is wondering if the binding energy has been modified. To test this the researcher irradiates the new form of Platinum with a UV-Laser with a wavelength of 125 nm and measures the kinetic energy of the electrons being ejected at 5.74 x 10-19 J. What is the binding energy of the new Platinum morphology? (1.60 x 10-19J = 1 eV)
The binding energy of Fe(s) is 612 kJ/mol.
a) What is the longest wavelength of light that can ionize a sample of iron metal? (Report your answer to three significant figures in nm; do not include the unit in the answer field)
b) Iron is irradiated with light of wavelength 12nm. What velocity does the electron leave the surface with? (Report your to three significant figures in scientific notation in m/s; do not include the unit in the answer field)
Periodic Trends: Ionization of an Excited Hydrogen Atom
A sample of hydrogen atoms is thermally excited so that the electrons are resting in the n=3 state. What is the wavelength of the lowest energy photon capable of ionizing these excited hydrogen atoms?
Photoelectric effect: Practice
A metal surface is irradiated by light from a laser with a wavelength of 492 nm. No electrons are measured leaving the surface. What is the most likely explanation
More Heisenberg Uncertainty Principal Questions:
Overall concept testing
Choose the incorrect statement:
Nature of electron
Choose the correct statement.
Uncertainty Principle
The uncertainty in the momentum Δp of a football traveling at 40 m/s is 1 ⋅\cdot 10−6 of its momentum. What is its uncertainty in position Δx? Mass=0.40 kg
The Heisenberg Uncertainty Principle
The Heisenberg Uncertainty Principle
As electrons were discovered to have both
wave
and
particle
properties, Heisenberg found that we cannot determine the
exact position
and
momentum
(direction and speed) simultaneously.
ΔxΔp≥h4π\boxed{\Delta x\Delta p\ge\frac{h}{4\pi}}
Wave Particle Duality and the Heisenberg Uncertainty Principle
A beam of electrons is accelerated towards a thin metal foil and diffracts to give the exact same pattern as a blue laser with wavelength of 480nm. (me = 9.11 x 10-31 kg)
a) What speed were the electrons accelerated to?'
b) If we measure the speed to a precision of ± 1% what is the minimum uncertainty in the position of the electron?
Quantum Model: Heisenberg Uncertainty Principle
The hardest slapshot ever recorded in North America was 175 km/h ± 2 %. If an average hockey puck weighs 170 g, what is the uncertainty in the position of the puck after it has been shot?
Heisenberg principle: Uncertainty of Position
A softball is thrown and the velocity is measured at 112 km/h. The error in the measurement is 0.5%. A softball weighs 212 g, what is the limit of the accuracy in the measurement of the softballs position?
Heisenberg principle: Uncertainty of Position
A circus performer is shot out of a cannon and leaves the cannon with a velocity of 6.2±\pm0.1 m/s. If the performer weighs 82 kg, what is the minimum uncertainty in their position?
Electromagnetic Radiation: Energy of Blue Laser Pointers
An argon ion laser produces a blue laser beam with a wavelength of 458 nm. What is the energy of this light expressed in kJ/mol?