SCI-CH Chem Test II fall 2018 Exam not valid for Paper Pencil Test Sessions
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1 SCI-CH Chem Test II fall 2018 Exam not valid for Paper Pencil Test Sessions [Exam ID:25FPCV 1 When a strontium atom loses its valence electrons, it has the same electron configuration as which element? A Rb B Xe C Ar D Kr 2 Directions: Type your answer in the box. Use "+" or "-" for the electrical charge. What is the oxidation number of an oxide ion? 3 A sodium atom has an electron configuration of 1s 2 2s 2 2p 6 3s 1. If the sodium atom becomes ionized, its new electron configuration will be the same as which element? A Lithium B Magnesium C Neon D Potassium 4 The electron configuration for magnesium is A 1s 2 2s 2 2p 6 3s 2 3p 2 B 1s 2 2s 2 2p 6 3s 2 C 1s 2 2s 2 2p 6 3s 1 D 1s 2 2s 2 2p 6 3s 1
2 5 1s 2 2s 2 2p 6 3s 2 3p 6... Complete the above electron configuration for calcium. A 4s 2 4p 1 B 3d 1 C 3d 1 4s 1 D 4s 2 6 How many valence electrons does a neutral atom of silicon have? A 5 B 3 C 6 D 4 7 The correct name for NH 4 Br is A ammonium bromine B nitorgen hydrobromide C ammonium bromide D ammonia bromide
3 8 Directions: Click and drag the text to the correct box. Place the letter of the orbital associated with each colored area of the periodic table. 9 How many electrons does the iron ion have when it forms the ionic compound FeCl 3? A 23 B 26 C 29 D One example of an ionic compound is A CO 2 B MgCl 2 C F 2 D HBr
4 11 Which of the following is the correct name for the compound MnF3? A Manganese fluoride(iii) B Manganese(III) fluoride(iii) C Manganese(III) fluoride D Manganese(I) fluoride(iii) 12 Directions: Click and drag the text to the correct box. Construct the electron configuration for phosphorus. 13 The correct formula for an ionic compound containing Ba 2+ and 2- CO3 is A Ba 2 CO 3 B BaCO 3 C Ba(CO 3 ) 2 D Ba 2 (CO 3 ) 2 14 An ionic bond will occur between A two positively charged atoms B two neutral atoms C two negatively charged atoms D an atom that is positively charged and an atom that is negatively charged 15 The correct formula for copper (I) bromide is A CuBr 2 B CuBr C Cu 2 Br D Cu 2 Br 3
5 16 What is the correct formula for aluminum chloride? A Al 2 Cl 3 B AlCl 3 C AlCl D Al 3 Cl 17 The 2 in H2 SO 4 is A an exponent B an oxidation number C a coefficient D a subscript 18 An alien astronaut landed on Earth and created the periodic table shown. The astronaut was trying to determine what type of bond would be present in several compounds. The type of bond in a compound containing G and E would be A a metallic bond B a nonmetallic bond C an ionic bond D a covalent bond 19 In general, how many valance electrons are needed for atoms to be most stable? A 18 B 2 C 8 D What is the mass of one mole of CO2? A 24 g B 56 g C 28 g D 44 g
6 21 Which of these is the percent of error in evaluating the molecular mass of a compound if the experimental value was amu and the known value was amu? A 3.3% B 2.1% C 4.2% D 1.0% 22 Which of these is most likely to form between elements transferring electrons to form oppositely charged particles? A A hydrogen bond B A covalent bond C An ionic bond D A metallic bond 23 Completing the chart, what is the electron configuration for Cl? A 1s 2 2s 2 2p 6 3s 2 3p 6 B 1s 2 2s 2 2p 6 3s 2 C 1s 2 2s 2 2p 6 3s 2 3p 4 D 1s 2 2s 2 2p 6 3s 2 3p 5 24 What is the name for the compound CaSO4? A Calcium sulfide B Calcium sulfate C Calcium sulfur oxide D Calcium sulfur oxygen 25 The molar mass (gram formula mass) for the compound sodium thiosulfate, Na2 S 2 O 3 is A 254 grams B 158 grams C 71 grams D 153 grams
7 26 What is the name of the compound with the formula NH4 NO 3? A Ammonium nitrate B Nitrogen nitrate C Nitrogen hydrogen oxide D Ammonium nitrogen trioxide 27 The correct name for Fe2 (SO 4 ) 3 is A iron (II) Sulfate B iron sulfate C iron (III) sulfate D iron (I) sulfate 28 Hydrogen chloride is a covalent compound. Which is a correct Lewis dot structure for HCl? A B C D
8 29 Using the table above, what is the correct formula for ammonium phosphate? A (NH 4 ) 3 PO 4 B (NH 4 ) 2 (PO 4 ) 3 C NH 4 (PO 4 ) 3 D NH 4 PO 4 30 Noble gases are chemically inactive because A their atomic structure can vary depending on reaction type B their outermost energy level is filled and stable C they cannot add or lose protons D they do not have valence electrons 31 Which of the following is the correct Lewis electron-dot diagram for the sodium atom? A B C D 32 What is the chemical formula for iron(ii) phosphide? A Fe 2 P B FeP 2 C Fe 2 P 3 D Fe 3 P 2
9 33 Which of the following represents the Lewis dot diagram of ammonia (NH3 )? A B C D 34 The formula for magnesium chloride is A MnCl B Mg 2 Cl 3 C MnCl 2 D MgCl 2 35 In the formula for barium chloride, (BaCl2 ), barium (Ba) is written first because it is A a single atom B a larger atom C the positive ion D the negative ion 36 Which is named first, when naming an ionic compound? A Cation B Ion C Polyatomic ion D Anion
10 37 What is the name of NH4 OH? A Nitrogen oxygen hydride B Ammonium hydroxide C Ammonium oxygen hydride D Nitrogen hydroxide 38 An atom has an electron configuration of 1s 2 2s 2 2p 5. The element belongs to the A carbon family B halogens C alkali metals D noble gases 39 What is element number 1? A Iron B Fluorine C Carbon D Chlorine 40 What is the electron configuration of Si 4+? A 1s 2 2s 2 2p 6 B 1s 2 2s 2 2p 6 3s 4 C 1s 2 2s 2 2p 6 3s 2 D 1s 2 2s 2 2p 6 3s 2 3p 2 41 What is the mass of one mole of O2? A g B 15.9 g C g D 5.3 g
11 42 The compound CuCl2 is named A copper chlorine B copper chloride C copper(i) chloride D copper(ii) chloride 43 The molar mass of Sr(NO3 ) 2 is A g/mol B g C g D g/mol 44 The oxidation number on the magnesium atom in the compound Mg 3 (PO 4 ) 2 is A 2 + B 4 + C 1 + D What is the molar mass of beryllium oxide (BeO)? A 13 g/mol B 25 g/mol C 24 g/mol D 12 g/mol 46 The formula that illustrates the arrangement of the atoms and bonds is the A empirical formula B structural formula C chemical formula D molecular formula 47 The molar mass for the compound Ba3 (PO 4 ) 2 is A 538 g/mol B 232 g/mol C 301 g/mol D 602 g/mol
12 48 In copper (II) chloride, the Roman numeral is equivalent to the A charge of chlorine B subscript of chlorine C charge of copper D subscript of copper 49 A student reads in his science book that in a certain reaction, a cation, Mg 2+ reacts with an anion, Cl - to form an ionic compound. In another reaction Mg 2+ reacts with another anion O 2- to form another ionic compound. Which option gives the correct ionic compounds and their names, formed in the two reactions? A Reaction 1: Mg Cl Magnesium chloride 2 Reaction 2: Mg 2 O Magnesium peroxide B Reaction 1: MgCl Magnesium chloride 2 Reaction 2: MgO Magnesium oxide C Reaction 1: MgCl Magnesium chlorate 2 Reaction 2: MgO Magnesium oxide D Reaction 1: Mg 2 Cl Magnesium chloride 2 Reaction 2: Mg 2 O 2 Magnesium peroxide 50 Directions: Type your answer in the box. Cations always have a charge
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