Quiz Chapter 3: CHE101-01-SP16.pdf - QuizChapter3:CHE10101SP16 QuizChapter3 Due May6at11:59pm TimeLimit None Points 33 Questions 33 Available

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Unformatted text preview: ۲۰۱٦/ ٤/ ۷ Quiz Chapter 3: CHE101­01­SP16 Quiz Chapter 3 Due May 6 at 11:59pm Time Limit None Points 33 Questions 33 Available after Mar 10 at 12:01am Attempt History Attempt Time Score LATEST Attempt 1 66 minutes 27 out of 33 Score for this quiz: 27 out of 33 Submitted Apr 7 at 7:43pm This attempt took 66 minutes. Question 1 1 / 1 pts 1. Valence electrons are ___. the outermost quantum shell of an atom Correct! the electrons contained in an atom’s valence shell notations that show only the valence electrons of an atom all the negatively charged electrons of an atom Question 2 1 / 1 pts 2. A valence shell is ___. Correct! the outermost quantum shell of an atom the electrons contained in an atom’s valence shell the number of electrons in an atom of an inert gas notations that show only the valence electrons of an atom Question 3 1 / 1 pts 1/11 ۲۰۱٦/ ٤/ ۷ Quiz Chapter 3: CHE101­01­SP16 3. Lewis structures are ___. the outermost quantum shell of an atom the electrons contained in an atom’s valence shell Correct! notations that show the valence electrons of an atom notations that show all the electrons of an atom Question 4 1 / 1 pts 4. The number of valence electrons for carbon is ___. 2 3 Correct! 4 6 Question 5 1 / 1 pts 5. The number of valence electrons for magnesium is ___. Correct! 2 3 4 6 Question 6 1 / 1 pts 6. The first quantum shell holds a maximum of ___ electrons. Correct! 2 2/11 ۲۰۱٦/ ٤/ ۷ Quiz Chapter 3: CHE101­01­SP16 6 8 18 Question 7 1 / 1 pts 7. The first and second quantum shell together hold a maximum of ___ electrons. 2 8 Correct! 10 18 Question 8 1 / 1 pts 8. The numbers of electrons in a chlorine atom's first three quantum shells are ______. 2, 8, 8 2, 7, 8 2, 6, 8 Correct! 2, 8, 7 Question 9 1 / 1 pts 9. In the compound NaCl, the sodium atom donates ____ electron(s) to the chlorine atom so that the chlorine atom can have an octet. Correct! 1 2 3/11 ۲۰۱٦/ ٤/ ۷ Quiz Chapter 3: CHE101­01­SP16 3 4 Question 10 0 / 1 pts 10. In the compound MgO, the magnesium atom donates ____ electron(s) to the oxygen atom so that the oxygen atom can have an octet. 1 Correct Answer 2 3 You Answered No answer text provided. Question 11 1 / 1 pts 11. CH4 is a polar covalent compound Correct! a nonpolar covalent compound an ionic compound not a compound at all Question 12 1 / 1 pts 12. H2 O is Correct! a polar covalent compound a nonpolar covalent compound an ionic compound 4/11 ۲۰۱٦/ ٤/ ۷ Quiz Chapter 3: CHE101­01­SP16 not a compound at all Question 13 1 / 1 pts 13. CaO is a polar covalent compound a nonpolar covalent compound Correct! an ionic compound not a compound at all Question 14 1 / 1 pts 14. A compound is An electrically neutral assembly of atoms held together by covalent bonds. A chemical bond resulting from the mutual attraction of oppositely charged ions. Correct! A pure substance formed by the chemical combination of two or more elements in a specific ratio. A bond consisting of a pair of electrons shared by two atoms. Question 15 1 / 1 pts 15. An ionic bond is An electrically neutral assembly of atoms held together by covalent bonds. Correct! A chemical bond resulting from the mutual attraction of oppositely charged ions. A pure substance formed by the chemical combination of two or more elements in a specific ratio. 5/11 ۲۰۱٦/ ٤/ ۷ Quiz Chapter 3: CHE101­01­SP16 A bond consisting of a pair of electrons shared by two atoms. Question 16 1 / 1 pts 16. A covalent bond is An electrically neutral assembly of atoms held together by covalent bonds. A chemical bond resulting from the mutual attraction of oppositely charged ions. A pure substance formed by the chemical combination of two or more elements in a specific ratio. Correct! A bond consisting of a pair of electrons shared by two atoms. Question 17 1 / 1 pts 17. A molecule is Correct! An electrically neutral assembly of atoms held together by covalent bonds. A chemical bond resulting from the mutual attraction of oppositely charged ions. A pure substance formed by the chemical combination of two or more elements in a specific ratio. A bond consisting of a pair of electrons shared by two atoms. Question 18 0 / 1 pts 18. Which bond is polar covalent? You Answered H­H C­S Na­Cl 6/11 ۲۰۱٦/ ٤/ ۷ Correct Answer Quiz Chapter 3: CHE101­01­SP16 C­O Question 19 1 / 1 pts 19. Which bond is ionic? H­H C­S Correct! Na­Cl C­O Question 20 0 / 1 pts 20. Which statement about NaCl is not true? It is an electrolyte. Correct Answer It has a low boiling point. It dissolves in water. You Answered Its ions have an orderly three­dimensional arrangement. Question 21 1 / 1 pts 21. CaCl 2 is carbon chloride Correct! calcium chloride carbon dichloride calcium dichloride 7/11 ۲۰۱٦/ ٤/ ۷ Quiz Chapter 3: CHE101­01­SP16 Question 22 1 / 1 pts 22. Which formula represents potassium oxide? Correct! K O 2 P O 2 3 KO P O 2 Question 23 1 / 1 pts 23. The formula mass of Al 2 O3 is 42.98 amu 58.98 amu Correct! 101.96 amu 112.94 amu Question 24 1 / 1 pts 24. The formula mass of magnesium sulfate is 56.37 72.37 Correct! 120.37 216.55 Question 25 0 / 1 pts 25. ____ Atom(s) of potassium will combine with _____atom(s) of nitrogen to make potassium nitride. 8/11 ۲۰۱٦/ ٤/ ۷ You Answered Quiz Chapter 3: CHE101­01­SP16 1, 1 2, 1 Correct Answer 3, 1 1, 3 Question 26 0 / 1 pts 26. In the compound methane, a carbon atom will form covalent bonds with ____ hydrogen atoms. 1 You Answered 2 3 Correct Answer 4 Question 27 0 / 1 pts 27. The total number of electrons in the covalent bonds of H2 O is ____. 2 Correct Answer 4 You Answered 6 8 Question 28 1 / 1 pts 28. The formula for the hydroxide ion is H­ 9/11 ۲۰۱٦/ ٤/ ۷ Quiz Chapter 3: CHE101­01­SP16 H O­ 2 O ­ 2 Correct! OH­ Question 29 1 / 1 pts 29. NaNO3 is Correct! sodium nitrate sodium nitrite natrium nitrate sodium nitrogen trioxide Question 30 1 / 1 pts 30. There are ___ carbon atoms in 2­methylpropane. 2 3 Correct! 4 5 Question 31 1 / 1 pts 31. Which statement about alkanes is not true? Alkanes have only single bonds. Correct! Alkanes contain only C, H, and O atoms. Alkanes are hydrocarbons. 10/11 ۲۰۱٦/ ٤/ ۷ Quiz Chapter 3: CHE101­01­SP16 Alkanes have only nonpolar covalent bonds. Question 32 1 / 1 pts 32. Which statement about the molecular formula C4 H10 is not true? The formula represents butane. The formula represents 2­methylpropane. Correct! The formula represents a compound with a carbon­carbon double bond. The formula represents an alkane. Question 33 1 / 1 pts 33. Which statement about organic compounds is true? 2­Pentanol is an alcohol with two C atoms in it. A compound with a hydroxyl group belongs to the aldehyde family. Propane has four carbon atoms. Correct! Octane has eight carbon atoms. Quiz Score: 27 out of 33 11/11 ...
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