SCIN131-Introduction to Chemistry-APUS-Lesson 2 Assignment

Part 1 of 3 - 20.0/ 20.0 Points Question 1 of 12 4.0/ 4.0 Points Group 7A elements are also called:  A.halogens.  B.alkaline earth metals.  C.alkali metals.  D.noble gases.  E.none of the above Answer Key: A Question 2 of 12 4.0/ 4.0 Points Mg is a member of which family?  A.alkaline earth metals  B.alkali metals  C.halogens  D.noble gases  E.none of the above Answer Key: A Question 3 of 12 4.0/ 4.0 Points The nucleus of an atom consists mainly of  A.protons and electrons.  B.protons and neutrons.  C.neutrons and electrons.  D.protons, neutrons, and electrons.  E.none of the above Answer Key: B Question 4 of 12 4.0/ 4.0 Points Which of the following is NOT a correct name, symbol combination?  A.magnesium, Mg  B.silicon, Si  C.manganese, Mn  D.beryllium, Be  E.iron, I Answer Key: E Question 5 of 12 4.0/ 4.0 Points How many electrons would be in a -2 charged anion of sulfur?  A.16  B.2  C.18  D.36  E.none of the above Answer Key: C

Part 2 of 3 - 20.0/ 20.0 Points Question 6 of 12 4.0/ 4.0 Points How many carbon atoms are in the formula Al2(CO3)3?  A.1  B.6  C.3  D.9  E.none of the above Answer Key: C Question 7 of 12 4.0/ 4.0 Points The charge of a vanadium ion in the compound V2O5 is:  A.10-  B.2+  C.5+  D.10+  E.none of the above Answer Key: C Question 8 of 12 4.0/ 4.0 Points Which metal atom below would NOT be involved in formation of a Type II compound?  A.Cr  B.Fe  C.Ba  D.Mn  E.none of the above Answer Key: C Question 9 of 12 4.0/ 4.0 Points What is the oxygen-to-hydrogen mass ratio for H2O2?  A.0.125  B.4  C.8  D.16  E.none of the above Answer Key: D Question 10 of 12 4.0/ 4.0 Points What is the proper name for HBr (aq)?  A.hydrobromous acid  B.hydrobromic acid  C.bromous acid  D.hydrousbromic acid  E.none of the above Answer Key: B

Part 3 of 3 - 7.5/ 10.0 Points Question 11 of 12 4.0/ 5.0 Points Write the name of each of the following Ionic Compounds: Ba3(PO4)2 , MgSO4 , PbO2 Ba3(PO4)2 is Barium Phosphate   MgSO4 is Magnesium Phosphate PbO2 is Lead(IV) oxide Feedback: Please review making and naming ionic compounds Comment: Magnesium sulphate Question 12 of 12 3.5/ 5.0 Points Please write the names of the following: Ag2O, P2S3, NaOH Ag2O is Silver (I) Oxide P2S3 is Phosphorous (III) Sulfide NaOH is Sodium Hydroxide. Comment: Diphosphorus Trisulfide

Part 1 of 3 - 20.0/ 20.0 Points Question 1 of 12 4.0/ 4.0 Points The number of protons in the nucleus of an atom  A.identifies the atom as a particular element.  B.is called the atomic number.  C.is given the symbol "Z."  D.is the same for all isotopes of an element.  E.all of the above Answer Key: E Question 2 of 12 4.0/ 4.0 Points All of the following statements about different elements are true EXCEPT:  A.Sulfur is considered a metalloid.  B.Manganese is a transition metal.  C.Iodine is a halogen.  D.Krypton is one of the noble gases.  E.Barium is an alkaline earth metal. Answer Key: A Question 3 of 12 4.0/ 4.0 Points What is the charge on the ion formed by aluminum?  A.13+  B.3+  C.3-  D.5-  E.none of the above Answer Key: B Question 4 of 12 4.0/ 4.0 Points Which statement below is NOT consistent with the nuclear theory of the atom as proposed by Rutherford?  A.Electrical charge is a fundamental property of protons and electrons in which like charges repel and opposite charges attract.  B.Most of the atom's mass and all of its positive charge is contained in a small core called the nucleus.  C.Most of the volume of the atom is empty space occupied by tiny, negatively charged electrons.  D.There are as many electrons outside the nucleus as there are protons inside the nucleus in a neutral atom.  E.All of the above statements are consistent. Answer Key: A Question 5 of 12 4.0/ 4.0 Points Group 1A elements are also called:  A.alkali metals.  B.noble gases.  C.halogens.  D.alkaline earth metals.  E.none of the above Answer Key: A

Part 2 of 3 - 20.0/ 20.0 Points Question 6 of 12 4.0/ 4.0 Points Ammonium fluoride is considered which of the following?  A.molecular element  B.ionic compound  C.atomic element  D.molecular compound  E.none of the above Answer Key: B Question 7 of 12 4.0/ 4.0 Points What is the correct formula for potassium dichromate?  A.K(CrO4)2  B.K2CrO4  C.KCr2O7  D.K2Cr2O7  E.none of the above Answer Key: D Question 8 of 12 4.0/ 4.0 Points A certain oxyacid is derived from the oxyanion SO32-. The formula for the oxyacid is  A.H2SO3.  B.H3SO3.  C.HSO3.  D.H2SO4.  E.none of the above Answer Key: A Question 9 of 12 4.0/ 4.0 Points What is the correct name for the BrO41- ion?  A.hypobromite  B.bromate  C.perbromate  D.bromite  E.none of the above Answer Key: C Question 10 of 12 4.0/ 4.0 Points What is the formula for an ionic compound made of magnesium and sulfur?  A.MgS  B.MgS2  C.Mg2S3  D.Mg2S  E.none of the above Answer Key: A

Part 3 of 3 - 10.0/ 10.0 Points Question 11 of 12 5.0/ 5.0 Points Please write the names of the following: Ag2O, P2S3, NaOH Ag2O is Silver(I) oxide P2S3 is Phosphorus Sulfide NaOH is Sodium Hydroxide Question 12 of 12 5.0/ 5.0 Points Give the A)Element Symbol, B) Atomic Number, C) Number of Protons, D) Number of Neutrons, (E) Mass Number, and (F) total Number of Electrons for: Barium–138 and Phosphorous-32 You must show your work in detail (where applicable) to receive credit. Barium­ 138 Element symbol Ba  Atomic number is 56  Number of protons 56  Number of neutrons = 82  Mass number = 138 Total number of electrons = 56 Phosphorus­ 32 Element Symbol is P Atomic number is 15 Number of protons = 15  Number of neutrons = 17 Mass number= 32 Total number of electrons = 15 Number of protons = Atomic number Number of neutrons= Mass number-­ atomic number Feedback: See chapter 4

Part 1 of 3 - 20.0/ 20.0 Points Question 1 of 12 4.0/ 4.0 Points `Which of the following concerning atoms is FALSE?  A.they comprise all matter  B.they are mostly empty space  C.they were not believed to exist until the 1800's  D.none of these are false  E.All of the above statements are false. Answer Key: C Feedback: See section 4.2 Question 2 of 12 4.0/ 4.0 Points `If aluminum were to form an ion, what would its charge be?  A.2-  B.1-  C.1+  D.2+  E.3+  F.3-  G.It is a transition metal, so it cannot be determined without further information. Answer Key: E Feedback: See the periodic table and section 4.7 Question 3 of 12 4.0/ 4.0 Points `Elements that are located to the right of the stair steps (zig-zag) line on the periodic table, but that do not touch it, would be classified as  A.metals  B.nonmetals  C.metalloids  D.noble gases  E.none of the above Answer Key: B Question 4 of 12 4.0/ 4.0 Points `How would you correctly write the atomic symbol for chlorine?  A.C  B.CL  C.cl  D.Ch  E.Cl Answer Key: E Feedback: See the periodic table. Question 5 of 12 4.0/ 4.0 Points `How many protons would be found in Ba2+ ?  A.56  B.58  C.137  D.81  E.54 Answer Key: E Feedback: See section 4.7

Part 2 of 3 - 20.0/ 20.0 Points Question 6 of 12 4.0/ 4.0 Points The ionic compound that forms between potassium and oxygen is  A.K2O2.  B.KO.  C.K2O.  D.KO2.  E.none of the above Answer Key: C Question 7 of 12 4.0/ 4.0 Points What is the name of the molecular compound SO3?  A.sulfur trioxide  B.sulfur tetraoxide  C.sulfur oxide  D.sulfur(IV) oxide  E.none of the above Answer Key: A Question 8 of 12 4.0/ 4.0 Points Choose the pair of names and formulas that do NOT match.  A.copper(II) nitride: Cu3N2  B.copper(II) nitrite: Cu(NO2)2  C.copper(I) nitrate: CuNO3  D.copper(II) nitrate: Cu(NO3)2  E.all of these are correct Answer Key: E Question 9 of 12 4.0/ 4.0 Points What is the formula for the acetate polyatomic ion?  A.C3H2O3-  B.C2H3O2-  C.C2H3O-  D.C2H3O22-  E.none of the above Answer Key: B Question 10 of 12 4.0/ 4.0 Points Which formula shows the proper use of parentheses?  A.Ca(F)2  B.(NH4)3(PO4)  C.Ca(NO3)2  D.Ca(SO4)  E.none of the above Answer Key: C

Part 3 of 3 - 0.0/ 10.0 Points Question 11 of 12 0.0/ 5.0 Points For Radon-222 and Carbon-14 answer each of the following. A) Element Symbol B) Atomic Number C) Number of Protons D) Number of Neutrons E) Mass Number F) total Number of Electrons You must show/explain your work in detail to receive credit. Number of protons = Atomic number Number of neutrons= Mass number-­ atomic numbe In a neutral atom, number of electrons = number of protons. Radon-222 Element symbol Rn  Atomic number is 86  Number of protons 86  Number of neutrons = 136  Mass number = 222 Total number of electrons = 86 Carbon-14 Element symbol  C Atomic number is 6  Number of protons 6  Number of neutrons = 8  Mass number = 14 Total number of electrons = 66 Feedback: this is covered in chapter 4 Question 12 of 12 0.0/ 5.0 Points `Chemistry really is another language sometimes. It abbreviates a lot, and chemical formulas are a way to write a little and still convey a lot of information. For example, consider the chemicals mercury, cadmium (II) phosphate, Lead (II) hydroxide, and pentanitrogen decaoxide. Translate these names into chemical formulas using the appropriate procedure described in the course text and my lecture material. Answer the following: (1) What is the correct formula of each of these compounds? (2) Explain how exactly (i.e. the procedure used) you arrived at your answer...in other words, walk me through your thinking. You will not receive credit if you don't show your work in detail. mercury : Was previously known as hydrargyrum and thus named as Hg cadmium (II) phosphate : Cadmium (II) is a +2, phosphate is a -3 so we get Cd3(PO4)2 Lead (II) hydroxide: Lead (II) is a +2 and OH has -1 so we get, Pb(OH)2 pentanitrogen decaoxide :  Feedback: chapter 5 discusses naming

Part 1 of 3 - 20.0/ 20.0 Points Question 1 of 12 4.0/ 4.0 Points How many electrons are in Br-?  A.36  B.7  C.4  D.34  E.none of the above Answer Key: A Question 2 of 12 4.0/ 4.0 Points Group 8A elements are also called:  A.alkaline earth metals.  B.noble gases.  C.alkali metals.  D.halogens.  E.none of the above Answer Key: B Question 3 of 12 4.0/ 4.0 Points What is the correct chemical symbol for mercury?  A.My  B.Hm  C.Hy  D.Me  E.none of the above Answer Key: E Question 4 of 12 4.0/ 4.0 Points Xe is a member of which family?  A.alkali metals  B.halogens  C.noble gases  D.alkaline earth metals  E.none of the above Answer Key: C Question 5 of 12 4.0/ 4.0 Points When an atom gains an electron, the resulting particle is called  A.an anion.  B.an isotope.  C.a proton.  D.a cation.  E.none of the above Answer Key: A

Part 2 of 3 - 20.0/ 20.0 Points Question 6 of 12 4.0/ 4.0 Points What is the formula mass of copper(II) fluoride?  A.90.00  B.146.10  C.165.10  D.101.55  E.none of the above Answer Key: D Question 7 of 12 4.0/ 4.0 Points What is the proper name for HBr (aq)?  A.hydrobromous acid  B.hydrobromic acid  C.bromous acid  D.hydrousbromic acid  E.none of the above Answer Key: B Question 8 of 12 4.0/ 4.0 Points What is the name of the ionic compound made of beryllium and chlorine?  A.beryllium chloride  B.beryllium dichloride  C.beryllium(II) chloride  D.monoberyllium dichloride  E.none of the above Answer Key: A Question 9 of 12 4.0/ 4.0 Points What is the correct formula for ammonium hydrogen sulfate?  A.(NH4)2SO4  B.NH4HSO4  C.Am2HSO4  D.(NH4)2HSO4  E.none of the above Answer Key: B Question 10 of 12 4.0/ 4.0 Points A certain oxyacid is derived from the oxyanion SO32-. The formula for the oxyacid is  A.H2SO3.  B.H3SO3.  C.HSO3.  D.H2SO4.  E.none of the above Answer Key: A

Part 3 of 3 - 10.0/ 10.0 Points Question 11 of 12 5.0/ 5.0 Points Write the chemical formula for each of the following ionic compounds: Copper (II) Bromide, Silver (II) Nitrate, Sodium Sulfate Copper (II) Bromide is CuBr2 Silver (II) Nitrate is Ag(NO3)2  Sodium Sulfate is Na2SO4 Feedback: CuBr2  Ag(NO3)2  Na2SO4 Question 12 of 12 5.0/ 5.0 Points Write the chemical formulas for the following: Calcium Nitrate, Potassium Sulfate, Ammonium Hydroxide. Calcium Nitrate is Ca(NO3)2 Potassium Sulfate is K2SO4  Ammonium Hydroxide is NH4OH Feedback: These can be found in chapter 5.

Question 1 of 12 4.0/ 4.0 Points Group 2A elements are also called:  A.noble gases.  B.alkaline earth metals.  C.alkali metals.  D.halogens.  E.none of the above Answer Key: B Question 2 of 12 4.0/ 4.0 Points Group 8A elements are also called:  A.alkaline earth metals.  B.noble gases.  C.alkali metals.  D.halogens.  E.none of the above Answer Key: B Question 3 of 12 4.0/ 4.0 Points How many protons and neutrons are in Cl-37?  A.17 protons, 37 neutrons  B.17 protons, 20 neutrons  C.37 protons, 17 neutrons  D.20 protons, 17 neutrons  E.none of the above Answer Key: B Question 4 of 12 4.0/ 4.0 Points Which of the following elements has an atomic number of 4?  A.H  B.He  C.Be  D.C  E.none of the above Answer Key: C Question 5 of 12 4.0/ 4.0 Points Xe is a member of which family?  A.alkali metals  B.halogens  C.noble gases  D.alkaline earth metals  E.none of the above Answer Key: C

Part 2 of 3 - 16.0/ 20.0 Points Question 6 of 12 0.0/ 4.0 Points Fluorine is considered which of the following?  A.molecular element  B.molecular compound  C.atomic element  D.ionic compound  E.none of the above Answer Key: A Question 7 of 12 4.0/ 4.0 Points Which of the following has the largest formula mass?  A.SiO2  B.NO2  C.CO2  D.SO2  E.H2O Answer Key: D Question 8 of 12 4.0/ 4.0 Points What would the formula of diiodine pentasulfide be?  A.I2S5  B.I5S2  C.I2S7  D.I4S9  E.none of the above Answer Key: A Question 9 of 12 4.0/ 4.0 Points What is the formula for an ionic compound made of barium and nitrogen?  A.Ba2N4  B.Ba2N3  C.Ba3N2  D.BaN  E.none of the above Answer Key: C Question 10 of 12 4.0/ 4.0 Points What is the name of CoS?  A.cobalt monosulfide  B.cobalt(II) sulfide  C.cobalt sulfide  D.cobaltous sulfur  E.none of the above Answer Key: B

Part 3 of 3 - 0.0/ 10.0 Points Question 11 of 12 0.0/ 5.0 Points Write the chemical formula for each of the following ionic compounds: Copper (II) Bromide, Silver (II) Nitrate, Sodium Sulfate Copper (II) Bromide : CuBr2 because Copper has a charge of 2+ and Bromide has only 1- Silver (II) Nitrate: Ag(NO3)2 because Silver originally had a charge of 2+ while Nitrate only had a charge of 1-  Sodium Sulfate : Na2SO4 because Sodium has a charge of 1+ and Sulfate with 2- charge. Feedback: CuBr2  Ag(NO3)2  Na2SO4 Question 12 of 12 0.0/ 5.0 Points Write the name of each of the following Ionic Compounds: Ba3(PO4)2 , MgSO4 , PbO2 Ba3(PO4)2 : Barium Phosphate  (Because of Phosphate ion and Barium) MgSO4 : Magnesium sulfate (Because of Sulfate ion and Magnesium) PbO2 :  Lead(IV) Oxide  (Because of Oxide and Lead) Feedback: Please review making and naming ionic compounds

Question 1 of 12 4.0/ 4.0 Points `How would you correctly write the atomic symbol for sodium?  A.NA  B.So  C.Na  D.Sm  E.S Answer Key: C Feedback: See the periodic table Question 2 of 12 4.0/ 4.0 Points A negatively charged ion is known as a(n) __________.  A.anion  B.cation  C.polyatomic ion  D.there are no negatively charged ions  E.none of the above Answer Key: A Feedback: See the section 4.7 Question 3 of 12 4.0/ 4.0 Points `When oxygen forms an ion, it  A.forms a 3- charge  B.loses two electrons  C.loses two neutrons  D.loses two protons  E.gains two electrons Answer Key: E Feedback: See section 4.7 Question 4 of 12 4.0/ 4.0 Points How many electrons would be in O2- ?  A.8  B.16  C.24  D.10  E.14 Answer Key: D Question 5 of 12 4.0/ 4.0 Points `In which group are the alkaline earth metals found?  A.Group 5A  B.Group 2A  C.Group 7A  D.Groups 3B through 2B  E.Group 1A Answer Key: B Feedback: See section 4.6

Part 2 of 3 - 20.0/ 20.0 Points Question 6 of 12 4.0/ 4.0 Points Which of the following is the correct way to write the formula for triboron hexafluoride?  A.B3F6  B.BF2  C.B6F3  D.BF6  E.none of the above Answer Key: A Feedback: use naming rules Question 7 of 12 4.0/ 4.0 Points how would you write a formula for iron (II) sulfide?  A.Fe2S2  B.FeS  C.Fe2S  D.FeS2 Answer Key: B Feedback: use naming rules andcharge balancing Question 8 of 12 4.0/ 4.0 Points `How many oxygen atoms are in the formula Al(NO3)3?  A.1  B.12  C.6  D.9  E.3 Answer Key: D Feedback: use formula to count Question 9 of 12 4.0/ 4.0 Points The formula, C17H19NO3​ is the chemical formula for morphine, a pain medication. How many total atoms are in the formula?  A.1  B.39  C.40  D.80  E.43 Answer Key: C Feedback: use formula to count Question 10 of 12 4.0/ 4.0 Points `What would be the proper way to write the name of a compound with the formula HNO3?  A.Nitrous acid  B.Nitric acid  C.hydronitrous acid  D.hydronitric acid  E.none of the above Answer Key: B Feedback: use naming rules

Part 3 of 3 - 0.0/ 10.0 Points Question 11 of 12 0.0/ 5.0 Points `Chemistry really is another language sometimes. It abbreviates a lot, and chemical formulas are a way to write a little and still convey a lot of information. For example, consider the formulas HNO3, AgCl , Al2(CO3)3 , and P2O3 (the numbers you see here are supposed to be subscripts). Translate these formulas into actual word names using the appropriate procedure described in the course text and my lecture material. Answer the following: (1) What are the formal names of each of these compounds? (2) Explain how exactly (i.e. the procedure used) you arrived at your answer...in other words, walk me through your thinking. You will not receive credit if you don't show your work in detail. 1) HNO3 : Nitric Acid AgCl : Silver Chloride Al2(CO3)3 : Aluminium carbonate   P2O3 : Diphosphorus Trioxide 2)  HNO3 : This is Nitric Acid because it contains NO3- which is Nitrate and bonding with hydrogen to form acid. AgCl : This is Silver Chloride because Ag represents Silver and Cl- is Chloride ion. Al2(CO3)3 : This would be Aluminium carbonate because Al represents Alluminium and (CO3)2-  represents carbonate ion. P2O3 : This would be Diphosphorus Trioxide because di represents 2 and 3 represents tri, so it would be Diphosphorus Trioxide.  Feedback: Naming Molecules is in chapter 5 Question 12 of 12 0.0/ 5.0 Points For Radon-222 and Carbon-14 answer each of the following. A) Element Symbol B) Atomic Number C) Number of Protons D) Number of Neutrons E) Mass Number F) total Number of Electrons You must show/explain your work in detail to receive credit. Atomic number gives us the total number of protons where as mass number gives us the total number of protons and neutrons, which are located in the center of the atom, (Nucleous). So based on these relations we will be able to solve for the number of electrons, protons and neutrons using atomic and mass numbers. Number of protons = Atomic number Number of neutrons= Mass number-­ atomic number In a neutral atom, number of electrons = number of protons. Radon-222 Element symbol Rn  Atomic number is 86  Number of protons 86  Number of neutrons = 136  Mass number = 222 Total number of electrons = 86 Carbon-14 Element symbol  C Atomic number is 6  Number of protons 6  Number of neutrons = 8  Mass number = 14 Total number of electrons = 66 Feedback: this is covered in chapter 4