Homework 05 - H Atom and Electron Configuration
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1 HW05 - H Atom and Eectron Configuration This is a preview of the pubished version of the quiz Started: Sep 25 at 6pm Quiz Instructions Homework 05 - H Atom and Eectron Configuration Question 1 Which of the foowing experiments provided evidence that the eectrons in atoms are arranged in distinct energy eves? the existence of eements with non-integer atomic weights the scattering of apha partices by a meta foi the resuts of the Miikan oi-drop experiment the observation of ine spectra from gas discharge tubes Question 2 Assume n and n are two adjacent energy eves of an atom. The emission of radiation with the ongest waveength woud 1 2 occur for which two vaues of n and n? 1 2 8,7,3 7,6 2,1 Question 3 Page 1 of 11
2 Use the Rydberg formua for atomic hydrogen to cacuate the waveength of the photon emitted in the transition of an eectron from n= to n=2. 86 nm 9.9 nm 8.63 nm 205 nm Question What is the name given to the spectroscope series to which the transition described in question 3 beongs? Brackett series Lyman series Bamer series Paschen series Question 5 In what region of ight wi the photons emitted in question 3 ie? visibe, red visibe, yeow visibe, bue utravioet Page 2 of 11
3 Question 6 The graph beow shows the radia distribution pots for the 1s wavefunctions for H and He. Which pot (A or B) is the 1s wavefunction for the He ion? + + B A There is no way to know. Question 7 What is the maximum number of eectrons that can have the quantum number n=2 in an atom? Question 8 Page 3 of 11
4 The three quantum numbers for an eectron in a hydrogen atom in a certain state are n=, =2, and m =1. The eectron is ocated in what type of orbita? 3p d 3d p Question 9 The number that describes the main energy eve of an eectron in an atom is... the magnetic quantum number, m. the atomic number, Z. the principa quantum number, n. the anguar momentum quantum number,. Question 10 Can an eectron in an atom be in an energy eve described by the set of quantum numbers n=5, =3, m =-2? No, because m cannot be negative. No, because m must equa ±1. No, because must equa n-1. Yes. Question 11 Page of 11
5 An eectron in a 3d orbita coud have which of the foowing quantum numbers? n=3, =2, m =0 n=3, =3, m =1 n=3, =2, m =-3 n=3, =1, m =-1 Question 12 How many p eectrons does Se (atomic number 3) possess? Question 13 For which H-atom wavefunction are you most ikey to find the eectron farthest from the nuceus? 2s 2p p 3p Question 1 Page 5 of 11
6 The transition metas are eements with partiay fied... f subshes. s subshes. d subshes. p subshes. Question 15 Which eement is predicted to have the ground-state eectron configuration shown beow? 2 [Ne] 3s 3p auminum chorine sufur siicon Question 16 Which of the foowing is the vaence eectronic structure for a haogen? 2 6 ns np 2 10 ns nd 2 5 ns np ns 2 Page 6 of 11
7 Question 17 In the Aufbau order of occupancy of eectronic energy eves, the eve occupied just after 5p is... 3f 6s 5d d Question 18 The eectron configuration for the Mn atom is s 2s 2p 3s 3p s 2s 2p 3s 3p s 3d s 2s 2p 3s 3p s p s 2s 2p 3s 3p s 3d Question 19 The ground state eectron configuration of a neutra siver atom is [Kr] 5s d instead of [Kr] 5s d. This observation can be expained (theoreticay) by the fact that the d subenergy eve has higher energy than the 5s subenergy eve. ony one eectron can occupy a 5s orbita. an enhanced stabiity is associated with fied sets of equivaent orbitas. the magnetism measurement shows one unpaired eectron. Page 7 of 11
8 Question 20 Which of the foowing atoms has the argest radius? Ne Br C F Question 21 As an atom's radius decreases... its ionization energy does not change. its ionization energy increases. its ionization energy decreases. its ionization energy wi either increase or decrease depending on whether you are going up a coumn or across a row. Question 22 Which of the foowing woud be expected to have the highest first ionization energy? Ar Si C Na Xe Page 8 of 11
9 Question 23 How many s eectrons does P (atomic number 15) possess? Question 2 How many vaues of the quantum number are possibe when n=5? Question 25 How many vaues of m are aowed for an eectron in a 5f subshe? Page 9 of 11
10 Question 26 How many vaues of m are aowed for an eectron in a 2s subshe? 1 3 None of these. Question 27 How many subshes are there in the she with n=3? Question 28 The diameter of the eectron density of an atom is roughy... None of these nm 1-5 nm nm Page 10 of 11
11 Question 29 For which of the foowing eements woud the size of the neutra atom (atomic radius) be the argest? Rb Na Sr Ca Question 30 Write an equation that represents the second ionization energy of nicke. Ni(g) + - Ni (g) + e 2+ - Ni(g) Ni (g) + 2e 2+ - Ni(g) Ni (g) + e Ni (g) Ni (g) + e Quiz saved at 6:01pm Submit Quiz Page 11 of 11
Homework 05 - H Atom and Electron Configuration
HW05 - H Atom and Eectron Configura!on! This is a preview of the pubished version of the quiz Started: Sep 18 at 12:47pm Quiz Instruc!ons Homework 05 - H Atom and Eectron Configuration Question 1 Which
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