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Wize University Chemistry Textbook > Early Atomic Theory to Quantum Theory

Schrodinger's Equation

1 Activity

Wize University Chemistry Textbook > Periodic Table Trends

Effective Nuclear Charge (Zeff)

3 Activities

Wize University Chemistry Textbook > Early Atomic Theory to Quantum Theory

Heisenberg Uncertainty Principal

3 Activities

Choose the incorrect statement:
More Effective Nuclear Charge (Zeff) Questions:
The Zeff for Cl is:
Atomic Radius
Calculate the effective nuclear charge (Zeff) for the following atoms.
Periodic Trends: Effective Nuclear Charge
What is the effective nuclear charge of Tellurium?
Periodic Trends: Effective Nuclear Charge
Calculate the approximate effective nuclear charge of Se.
"The Periodic Table", image retrieved from Chemistry 2e (https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/Chemistry2e-OP_QCzV58S.pdf) by Flowers, P et al., is licensed under CC BY.
Periodic Trends: Effective Nuclear Charge
What is the approximate effective nuclear charge for Al?
"The Periodic Table", image retrieved from Chemistry 2e (https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/Chemistry2e-OP_QCzV58S.pdf) by Flowers, P et al., is licensed under CC BY.
Periodic Trends: Z Effective
What is the Zeff on an electron in the valence shell of Mg?
Periodic Trends: Z Effective
Which of the following periodic properties increases with the increase in effective nuclear charge across a period?
i. Ionization energy
ii. Electron affinity
Periodic Trends: Effective nuclear charge
What is the most likely value for the Zeff of an electron in the valence shell of Mg?
Atom: Atomic Properties
Students in a previous year were asked a certain set of questions. For each of the questions and the given responses, in the corresponding boxes, identify whether the student response is correct or incorrect and the corrections that need to be made.
a) Question: IE for O = 1310 kJ/mol and IE for Cl = 1250 kJ/mol. Explain why this difference exists.
Student’s response: Because Cl has a higher n-value the electrons are further from the nucleus, giving the atom more room and the ability to add additional electron(s).
Periodic Trends: Practice
Complete the statements below by filling in the blanks and then choose which option below would help explain your answer.
Periodic Trend: Z effective
The Zeff for Cl is:
More Heisenberg Uncertainty Principal Questions:
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?
Elements: Binding Energy
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?
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?