25/5/2020
Review Test Submission: Quiz 4 - Periodicity – Chemistry... THAO PHAM VAN IU Cours 4 e 4 s H
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Review Test Submission: Quiz 4 - Periodicity User THAO PHAM VAN Course
Chemistry for Engineers_S2_2019-20_G02 Test Quiz 4 - Periodicity Started 4/10/20 2:37 PM Submitted 4/10/20 3:06 PM Due Date 4/10/20 11:59 PM Status Completed Attempt Score 100 out of 100 points Time Elapsed 29 minutes out of 1 hour
Results Displayed All Answers, Submitted Answers Question 1 5 out of 5 points
Which one of the following series is arranged in order of increasing value?
Selected Answer: The first ionization energies of oxygen, fluorine, neon Answers:
The radii of H- ion, H atom, H+ ion
The first ionization energies of oxygen, fluorine, neon
The boiling points of iodine, bromine, chlorine
The electronegativities of chlorine, bromine, iodine Question 2 5 out of 5 points
Which is the most metallic in the following atoms, Bi, S, Ba, As, Ca? Selected Answer: Ba Answers: Bi S Ba As Ca Question 3 5 out of 5 points
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Review Test Submission: Quiz 4 - Periodicity – Chemistry...
Consider a nitrogen atom in the ground state and choose the correct statement below.
A. Zeff for an electron in a 2s orbital is greater than that for the 1s orbital.
B. The Zeff for the 2p and 2s orbitals is the same.
C. More energy is required to remove and electron from a 2s orbital than from the 2p orbital.
D. The 2s electron is less shielded than the 2p electron.
Selected Answer: C and D is correct Answers: A and B is correct C and D is correct A,B,C are correct A is correct All are correct None is correct Question 4 5 out of 5 points
Consider the following orderings. I. Al < Si < P < S II. Be < Mg < Ca < Sr III. I < Br < Cl < F
Which of these give(s) a correct trend in atomic size? Selected Answer: II only Answers: I only II only III only I and II only II and III only Question 5 5 out of 5 points
In which set of elements would all members be expected to have very similar chemical properties? Selected Answer: O, S, Se Answers: S, Se, Si O, S, Se N, O, F Na, Mg, K
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Review Test Submission: Quiz 4 - Periodicity – Chemistry... Question 6 5 out of 5 points
Which property increases with increasing atomic number for both the alkali and the halogens? Selected Answer: Atomic radius Answers: Melting point Atomic radius Electronegativity Ionization energy Question 7 5 out of 5 points
Which of the following would have to lose two electrons in order to achieve a noble gas electron configuration? O Sr Na Se Br Selected Answer: Sr Answers: O, Se Sr Na Br Sr, O, Se Question 8 5 out of 5 points
Which of the following atoms, designated by their electron configurations, has the highest ionization energy? Selected Answer: [Ne]3s2 3p3 Answers: [Kr]4d105s25p3 [Ne]3s2 3p2 [Ne]3s2 3p3 [Ar]3d104s24p3 Question 9 5 out of 5 points
The only noble gas without eight valence electrons is __________. Selected Answer: He Answers: Ar Ne He
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Review Test Submission: Quiz 4 - Periodicity – Chemistry... Kr
All noble gases have eight valence electrons. Question 10 5 out of 5 points
Choose the wrong statement(s) among I, II and III:
I. Metals conduct electricity; nonmetals do not.
II.When metals and nonmetals form stable ions, nonmetal ions tend to have a positive charge, while
metal ions tend to have a negative charge.
III.Metal oxides are ionic and act as acids, while nonmetal oxides are nonionic and acts as bases.
Selected Answer: II and III only Answers: I and III only II and III only I and II only All are correct All are wrong Question 11 5 out of 5 points
The electron configuration of element X is 1s2 2 6 2 6 3 2
2s 2p 3s 3p 3d 4s . What is its period number and group?
Selected Answer: Period 4, Group VB. Answers: Period 2, Group IVA. Period 4, Group IVA. Period 2, Group IIA. Period 4, Group VB. Question 12 5 out of 5 points
The ion NO- has __________ valence electrons. Selected Answer: 12 Answers: 15 14 16 10 12
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Review Test Submission: Quiz 4 - Periodicity – Chemistry... Question 13 5 out of 5 points
How much energy, in joules, must be absorbed to convert to Na+ all the atoms present in 1.00 mg of
gaseous Na? The first ionization energy of Na is 495.8 kJ/mol? Selected Answer: 21.6 J Answers: 12.9 J 21.6 J 48.7 J 63.4 J Question 14 5 out of 5 points
Strontium is an element in Group 2 of the Periodic Table with atominc number 38. Which of the
following statements about strontium is NOT correct?
Selected Answer: Its atomic radius is smaller than that of magnesium Answers:
It has two electrons in its outermost energy level
Its first ionization energy is lower than that of calcium
Its atomic radius is smaller than that of magnesium
It forms a chloride with the formula SrCl2 Question 15 5 out of 5 points
What is the formula and name of the compound formed from the following ionic interaction: the 2+
ion is the smallest with a filled d subshell; the anion forms from the smallest halogen? Selected Answer: zinc fluoride Answers: zinc fluoride manganese (II) bromide sodium chloride silver iodide Question 16 5 out of 5 points
The halogens, alkali metals, and alkaline earth metals have __________ valence electrons, respectively. Selected Answer: 7, 1, and 2 Answers: 7, 4, and 6 1, 5, and 7
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Review Test Submission: Quiz 4 - Periodicity – Chemistry... 8, 2, and 3 7, 1, and 2 2, 7, and 4 Question 17 5 out of 5 points
What is the maximum number of Cs+ ions that can be produced per joule of energy absorbed by a
sample of gaseous Cs atoms? (First ionization energy of Cs is 375.7 kJ/mol)
Selected Answer: 1.603 x 1018 Cs+ ions Answers: 2.781 x 1017 Cs+ ions 1.603 x 1018 Cs+ ions 3.549 x 1017 Cs+ ions 4.876 x 1018 Cs+ ions Question 18 5 out of 5 points
Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.
Selected Answer: increases, decreases Answers: decreases, increases increases, increases increases, decreases stays the same, increases increases, stays the same Question 19 5 out of 5 points
Which of the following does not have the ground-state configuration 1s2 2 6 2s 2p ? Selected Answer: Cl- Answers: Ne Na+ Cl- F- Question 20 5 out of 5 points
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Review Test Submission: Quiz 4 - Periodicity – Chemistry...
Choose the correct rankings for these ions below in order of increasing size:
Selected Answer: Li+ < Na+ < K+ Rb+ < Se2- < Br- F- < O2- < N3- Answers: K+ < Na+ < Li+ Rb+ < Se2- < Br- F- < O2- < N3- Na+ < Li+ < K+ Se2- < Rb+ < Br- O2-< F- < N3- Li+ < Na+ < K+ Rb+ < Se2- < Br- F- < O2- < N3- Na+ < K+ < Li+ Br- < Rb+ < Se2- N3- < F- < O2-
Monday, May 25, 2020 8:42:25 PM ICT ← OK O
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