Chemistry Chemistry Practice Problems Solutions Library

Bohr Model Solutions Library

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71 solutions

Bohr Model

Q. Which transition would result in the absorption of a photon with the longest wavelength?

Solved • Feb 2, 2021

Bohr Model

Q. Which transition would result in the emission of photons with the lowest frequency? 

Solved • Feb 2, 2021

Bohr Model

Q. Which of the following transitions would result in the emission of a photon with the largest energy? A) from n = 2 to n = 1B) from n = 4 to n = 1C)...

Solved • Jan 27, 2021

Bohr Model

Q. Which transition would result in the largest absorption of energy? 

Solved • Jan 27, 2021

Bohr Model

Q. What is the bohr model for Sodium?

Solved • Jan 20, 2021

Bohr Model

Q. Which of the following is a reasonable criticism of the Bohr model of the atom? a. It makes no attempt to explain why the negative electron does no...

Solved • Nov 10, 2020

Bohr Model

Q. Which of the following statements is TRUE? A. The emission spectrum of a particular element is always the same and can be used to identify the elem...

Solved • Oct 23, 2020

Bohr Model

Q. How much energy does the electron have initially in the n = 4 excited state?The electron from a hydrogen atom drops from an excited state into the ...

Solved • Jul 2, 2020

Bohr Model

Q. Which transition in a hydrogen atom would absorb the photon of greatest frequency?n = 3 to n = 1n = 6 to n = 2n = 2 to n = 9n = 35 to n = 2n = 12 t...

Solved • Jun 16, 2020

Bohr Model

Q. A certain quantum mechanical system has the energy levels shown in the accompanying diagram. The energy levels are indexed by a single quantum numb...

Solved • Apr 30, 2020

Bohr Model

Q. 1. For a hydrogen-like atom, classify these electron transitions by whether they result in the (absorption) or (emission) of light?n=1 to n=3 n=2 t...

Solved • Apr 30, 2020

Bohr Model

Q. Determine the energy of an electron in the given quantum level of each of the following ions. (Hint: Each of the ions has a different number of pro...

Solved • Mar 17, 2020

Bohr Model

Q. Which transition in a hydrogen atom would absorb the photon of greatest frequency?n = 3 to n = 1n = 6 to n = 2n = 2 to n = 9n = 35 to n = 2n = 12 t...

Solved • Mar 17, 2020

Bohr Model

Q. Which transition in a hydrogen atom would emit the photon of greatest frequency?n = 35 to n = 2n= 6 to n = 2  n = 12 to n = 6n = 1 to n = 4n = 2 to...

Solved • Mar 17, 2020

Bohr Model

Q. Consider the following portion of the energy-level diagram for hydrogen:n = 4   –0.1361 × 10 –18  Jn = 3   –0.2420 × 10 –18  Jn = 2   –0.5445 × 10 ...

Solved • Nov 22, 2019

Bohr Model

Q. According to the Bohr model for the hydrogen atom, which of the following transitions will emit light with the longest wavelength?a. from the n = 4...

Solved • Oct 8, 2019

Bohr Model

Q. Which of the following transitions (of the electron in a hydrogen atom) result from the emission of a photon with the largest energy?A) n = 2 to n ...

Solved • Sep 12, 2019

Bohr Model

Q. For this question consider the figure that shows an energy level diagram for a certain atom (not hydrogen). Several transitions are shown and are l...

Solved • Aug 29, 2019

Bohr Model

Q. For this question consider the figure that shows an energy level diagram for a certain atom (not hydrogen). Several transitions are shown and are l...

Solved • Aug 29, 2019

Bohr Model

Q. What would a Bohr Model for magnesium look like?

Solved • Aug 7, 2019

Bohr Model

Q. (a) How much energy is required to ionize hydrogen when it is in the ground state?eV(b) How much energy is required to ionize hydrogen when it is i...

Solved • Jul 9, 2019

Bohr Model

Q. Consider the three electronic transitions in a hydrogen atom shown here, labeled A, B, and C.Three electromagnetic waves, all drawn on the same sca...

Solved • Nov 12, 2018

Bohr Model

Q. Does the hydrogen atom "expand" or "contract" when an electron is excited from the n = 1 state to the n = 4 state?

Solved • Nov 12, 2018

Bohr Model

Q. Place the following transitions of the hydrogen atom in order from longest to shortest wavelength of the photon emitted.

Solved • Nov 12, 2018

Bohr Model

Q. The hydrogen atom can absorb light of wavelength 1094 nm.Determine the initial value of n associated with this absorption.        

Solved • Nov 12, 2018

Bohr Model

Q. Using equation E= (hcRH)(1/n2) = (-2.1810-18J)(1/n2), calculate the energy of an electron in the hydrogen atom when n = 6.

Solved • Nov 12, 2018

Bohr Model

Q. Is energy emitted or absorbed when the following electronic transitions occur in hydrogen?from an orbit of radius 2.12 Å to one of radius 8.46 Å,

Solved • Nov 12, 2018

Bohr Model

Q. Which transition emits light with the shortest wavelength?(a) n = 5 → n = 4(b) n = 4 → n = 3(c) n = 3 → n = 2

Solved • Nov 12, 2018

Bohr Model

Q. The energy of a vibrating molecule is quantized much like the energy of an electron in the hydrogen atom. The energy levels of a vibrating molecule...

Solved • Nov 12, 2018

Bohr Model

Q. An electron in a hydrogen atom is excited with electrical energy to an excited state with n = 2. The atom then emits a photon. What is the value of...

Solved • Nov 12, 2018

Bohr Model

Q. Using the Bohr model, determine the energy, in joules, necessary to ionize a ground-state hydrogen atom. Show your calculations.

Solved • Oct 22, 2018

Bohr Model

Q. Why is the electron in a Bohr hydrogen atom bound less tightly when it has a quantum number of 3 than when it has a quantum number of 1?

Solved • Oct 22, 2018

Bohr Model

Q. The light produced by a red neon sign is due to the emission of light by excited neon atoms. Qualitatively describe the spectrum produced by passin...

Solved • Oct 22, 2018

Bohr Model

Q. A Bohr-model representation of the H atom is shown below with several electron transitions depicted by arrows:Rank the emissions in terms of increa...

Solved • Oct 17, 2018

Bohr Model

Q. Arrange the following H atom electron transitions in order of  decreasing wavelength of the photon absorbed or emitted:(a) n = 2 to n = ∞          ...

Solved • Oct 17, 2018

Bohr Model

Q. Arrange the following H atom electron transitions in order of  increasing frequency of the photon absorbed or emitted:(a) n = 2 to n = 4           ...

Solved • Oct 17, 2018

Bohr Model

Q. Using vertical lines, indicate the following transitions a. n = 3 → n = 2b. n = 4 → n = 2c. n = 2 → n = 1on an energy-level diagram for the hydroge...

Solved • Oct 15, 2018

Bohr Model

Q. Atomic emission spectra are due to electronsa. being removed from an atom.b. in an atom rising from one energy level to a higher one.c. in an atom ...

Solved • Jun 26, 2018

Bohr Model

Q. The bright lines of an emission spectrum are the result of _____.a. electrons being ejected from atomsb. electrons losing energy as they spiral int...

Solved • Mar 26, 2018

Bohr Model

Q. Which of the following processes is endothermic?a. An atom emits a photon.b. The electron gain process of a fluorine atom.c. An atom absorbs a phot...

Solved • Mar 16, 2018

Bohr Model

Q. How much energy is required to ionize hydrogen: a. When it is in the ground state and b. When it is in the 2nd excited state with n = 3.

Solved • Mar 15, 2018

Bohr Model

Q. The energies, E, for the first few states of an unknown element are shown here in arbitrary units.

Solved • Mar 8, 2018

Bohr Model

Q. Consider a hydrogen atom in the ground state. What is the energy of its electron?Now consider an excited- state hydrogen atom. What is the energy o...

Solved • Dec 21, 2017

Bohr Model

Q. How much energy does the electron have initially in the n=4 excited state? Enter your answer numerically in joules.    What is the change in energy...

Solved • Dec 19, 2017

Bohr Model

Q. Consider a hydrogen atom in the ground state. What is the energy (in J) of its electron?     Now consider an excited-state hydrogen atom. What is t...

Solved • Sep 26, 2017

Bohr Model

Q. A) How much energy does the electron have initially in the n = 4 excited state? Enter your answer numerically in joules.   B) What is the change in...

Solved • Sep 22, 2017

Bohr Model

Q. Which match is incorrect?a) de Broglie       Predicted that matter had a wave natureb) Planck            Proposed that energy is released/absorbed ...

Solved • Aug 24, 2017

Bohr Model

Q. Which of the following electron transitions requires the smallest energy to be absorbed by the hydrogen atom?A. from n = 1 to n = 2B. from n = 2 to...

Solved • Aug 17, 2017

Bohr Model

Q. According to the Bohr model for the hydrogen atom, which of the following transitions will emit light with the longest wavelength?a. from the n = 4...

Solved • Jun 16, 2017

Bohr Model

Q. Which of the following statements is (are) TRUE?I. An excited atom can return to its ground state by absorbing electromagnetic radiation.II. The en...

Solved • May 25, 2017

Bohr Model

Q. Which transition between energy levels in a hydrogen atom corresponds to the shortest wavelength of light?1. 5 → 62. 2 → 53. 2 → 34. 3 → 55. 3 → 46...

Solved • Oct 18, 2016

Bohr Model

Q. Which of the following transitions represents the emission of a photon with the largest energy?A) n = 1 to n = 4B) n = 2 to n = 5C) n = 3 to n = 1D...

Solved • Sep 14, 2016

Bohr Model

Q. Consider the process of 2 H(g) → H2(g) where ΔH = −436 kJ/molDetermine if the sentence below is true or false.Shining light on hydrogen atoms could...

Solved • Aug 8, 2016

Bohr Model

Q. Indicate whether energy is emitted or absorbed when the following electronic transitions occur in hydrogen: (a) from n = 2 to n = 6

Solved • Jul 15, 2016

Bohr Model

Q. Is energy emitted or absorbed when the following electronic transitions occur in hydrogen: (a) from n = 4 to n = 2

Solved • Jul 15, 2016

Bohr Model

Q. Which of the following transitions represent  absorption of a photon with the  highest frequency? n = 3 to n = 1n = 2 to n = 4n = 1 to n = 2n = 6 t...

Solved • May 26, 2016

Bohr Model

Q. Which of the following transitions (in a hydrogen atom) represent  emission of the smallest or shortest wavelength? n = 4 to n = 2n = 3 to n=  4n =...

Solved • May 26, 2016

Bohr Model

Q. Which emission line in the hydrogen spectrum occurs at the highest frequency?a) n = 3 → n = 1b) n = 4 → n = 2c) n = 7 → n = 5d) n = 10 → n = 8

Solved • Apr 26, 2016

Bohr Model

Q. According to the Bohr atomic theory, when an electron moves from one energy level to another further from the nucleusa) energy has been absorbedb) ...

Solved • Mar 22, 2016

Bohr Model

Q. Which of the following statements is or are true?1. An excited atom can return to a lower energy level by absorbing light energy.2. An atom can be ...

Solved • Mar 22, 2016

Bohr Model

Q. The lines in the emission spectrum of hydrogen result from ___________________ .A) electrons given off by hydrogen as it coolsB) decomposing hydrog...

Solved • Mar 15, 2016

Bohr Model

Q. The lines in the emission spectrum of hydrogen result from __________. A) electrons given off by hydrogen as it coolsB) decomposing hydrogen atomsC...

Solved • Mar 15, 2016

Bohr Model

Q. Using Bohr's equation for the energy levels of the electron in the hydrogen atom, determine the energy (J) of an electron in the n = 4 level.a) -5....

Solved • Mar 15, 2016

Bohr Model

Q. What wavelength of light will be required to remove an electron from the n = 3 shell of a hydrogen atom?

Solved • Mar 11, 2016

Bohr Model

Q. Which energy gap in the Bohr Model would be associated with the longest wavelength?(A) from n = 2 to n = 1(B) from n = 6 to n = 5(C) from n= 10 to ...

Solved • Mar 11, 2016

Bohr Model

Q. For a hydrogen atom, which case will result in an absorption spectrum with the highest frequency?a.  an electron transition from n = 1 → n = 2b.  a...

Solved • Mar 4, 2016

Bohr Model

Q. Atoms with one electron can be modeled with an equation similar to the Bohr equation:          Ea = -2.179x10-18 J (Z2/n2) In the equation, Z is ...

Solved • Feb 22, 2016

Bohr Model

Q. Using the figure down below, complete the following statement: When an electron undergoes Transition A, it ________ energy, and when it undergoes T...

Solved • Feb 13, 2016

Bohr Model

Q. Which electronic transition in the hydrogen atom results in the emission of light of the shortest wavelength?A. n = 4 to n = 3B. n = 1 to n = 2C. n...

Solved • Feb 13, 2016

Bohr Model

Q. How many unique emission lines are observed from a system with four equally spaced energy levels?a. 1b. 2c. 3d. 4e. 5

Solved • Feb 13, 2016

Bohr Model

Q. According to the Bohr model for the hydrogen atom, the energy necessary to excite an electron from n = 1 to n = 2 is _______ the energy necessary t...

Solved • Feb 4, 2016