Chemistry Final Exam Dr. Whitcomb Test Questions – Flashcards
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The total maximum number of electrons in the 3p orbitals is 6. T or F |
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True |
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A 3p orbital is larger than a 2 p orbital. T or F |
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True |
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The Greek symbol used in chemistry notation for 'partial" or "slightly" is ?. T or F |
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True |
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Different wavelengths of light carry different amount of energy. T or F |
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True |
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A polar covalent bond is more ionic than an ionic bond. T or F |
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False |
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Electronegativities generally decrease from left to right in the Periodic Table. T or F |
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False Electronegativities increase from left to right on the Periodic Table. |
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Water is an example of a polar molecule. T or F |
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True |
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Phosphorous normally can be expected to form 3 bond with other elements. T or F |
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True |
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The abbreviation for wavelength is the Greek letter ?. T or F |
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False. ? = wavelength |
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Calcium has 4 electrons in its 4s orbital |
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False. An s orbital only supports up to 2 electrons |
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Silicon is an example of a "d-block" element. T or F |
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False. It's in the p-block. |
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The ionization energy for phosphorous is higher than for sodium. T or F |
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True. P WANTS electrons. Na isn't really that interested in more electrons. |
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The octet rule must be satisfied for all the element in C2O4H2. T or F |
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False. H follows the duet rule, not the octet rule. |
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H2O2 is an example of a diatomic molecule. T or F |
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False.Diatomic molecules: H2, N2, O2, F2, Cl2, Br2, and I2. |
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Triple bonds contain a total of 6 electrons. T or F |
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True |
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The reaction between Na0 and H2O should be similar to K0 and H2O. T or F |
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True |
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The net charge of an ionic compound must be zero. T or F |
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True |
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Li+ has the same properties as He. T or F |
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False??? |
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NH4Cl sublimed in the Separation of Mixtures laboratory. T or F |
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True |
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The number of valence electrons = Z minus the number of core electrons. T or F |
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True |
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Electronegativities: H = 2.1, Be = 1.5, N = 3.0, F = 4.0, O = 3.5 The correct dipole moment arrow for a Be-N bond is: a. <+ b. +> c. ^ d. v e. no arrow, there is no dipole |
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b. +> Because N (3.0) has a higher electronegativity than Be (1.5). |
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KBr is: a: a ternary compound b: an element c: a diatomic molecule d: a globular cluster e: an ionic compound |
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e. an ionic compound |
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N2 is:a. a binary compoundb. an elementc. a diatomic moleculed. a polar moleculee. an ion |
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c. a diatomic molecule |
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Metallic gold is: a. a binary compound b. an element c. a diatomic molecule d. a metalloid e. an ion |
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b. an element |
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Electronegativities: H = 2.1, Be = 1.5, N = 3.0, F = 4.0, O = 3.5 The type of bond in Be-Be is: a. ionic b. polar covalent c. covalent d. polar ionic e. unstable |
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c. covalent Be = 1.5 1.5 - 1.5 = 0.0 |
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Electronegativities: H = 2.1, Be = 1.5, N = 3.0, F = 4.0, O = 3.5 The type of bond in C-F is: a. ionic b. polar covalent c. covalent d. polar ionic e. unstable |
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b. polar covalent C = 2.5 F = 4 4 - 2.5 = 1.5 |
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Electronegativities: H = 2.1, Be = 1.5, N = 3.0, F = 4.0, O = 3.5 The type of bond in Be-F is: a. ionic b. polar covalent c. covalent d. polar ionic e. unstable |
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a. ionic Be = 1.5 F = 4.0 4.0 - 1.5 = 2.5 |
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Electronegativities: H = 2.1, Be = 1.5, N = 3.0, F = 4.0, O = 3.5 The correct order of the following bonds from least polar to most polar is: a. Be-C, Be-N, H-F, O-O b. H-F, O-O, Be-N, Be-C c. Be-N, Be-C, O-O, H-F d. O-O, Be-C, Be-N, H-F e. O-O, Be-N, H-F, Be-C |
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d. O-O, Be-C, Be-N, H-F O-O 3.5 - 3.5 = 0.0 Least Polar Be-C 1.5-2.5 = 1.0 Be-N 1.5-3.0 = 1.5 H-F 4.0-2.1 = 1.9 Most Polar |
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The order of orbital filling begins with: a. 1s, 2s, 2d, 2p b. 3s, 2p, 2s, 1s c. 1s, 2s, 2p, 2d d. 1s, 2s, 3s, 4s e. 1s, 2s, 2p, 3s |
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e. 1s, 2s, 2p, 3s |
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H2O has the molecular geometry:a. Trigonal pyramidb. Trigonal Planarc. Bent or V-shapedd. Tetrahedrale. Ternary |
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c. Bent or V-shaped |
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Is it a chemical or physical change?Boiling liquid N2 (like I showed in class) |
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Physical |
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Is it a chemical or physical change? The copper dome on St. Paul's cathedral turning blue-green |
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Chemical |
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Is it a chemical or physical change? Gasoline burning when you drive your car |
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Chemical |
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Is it a chemical or physical change? Formation of cans from molten aluminum |
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Physical |
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Phosphorus electronic configuration |
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1s22s22p63s23p2 |
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Phosphorus orbital box diagram |
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[^v] [^v] [^v][^v][^v] [^v] [^ ][^ ][^ ] |
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From the Periodic Table, what metalloid as 3d10 electrons and only 4p3 electrons? |
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As |
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The following orbital box diagram for 1s22s22p4 is incorrect:[^v] [^v] [^v][^v][ ] What's the correct version? |
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[^v] [^v] [^v][^ ][^ ] |
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Name an example of a positively charged ion and it's elemental symbol with the correct charged ion. |
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SodiumNa+ |
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Name an example of a negatively charged ion and it's elemental symbol with the correct charged ion. |
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Chloride Cl- |
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Name an example of an alkaline earth metal and it's elemental symbol with the correct charged ion. |
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Magnesium Mg+2 |
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Name an example of a halogen and it's elemental symbol with the correct charged ion. |
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Bromine Br- |
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Name an example of a noble gas. |
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Argon |
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Name and example of a transition metal. |
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Copper |
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Name the two types of ions. |
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cations and anions |
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What is the isotopic symbol for Neon? |
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2010Ne |
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How many neutrons does titanium have? |
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47.88 - 22 = 25.88 = 26 |
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Give the correct formula for a compound containing Cr3+ and S2-: |
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Cr2S3: |
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Write the correct name for MgS: |
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magnesium sulfide |
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How many valence electrons and core electrons does each of the following have? 1. Chlorine 2. Calcium 3. Boron |
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1. Chlorine -- 7val, 10core 2. Calcium -- 2val, 18core 3. Boron-- 3val, 2core |
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Give the proper name or chemical symbol for the following elements: Nickel Si Potassium Nitrogen Carbon S |
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Nickel -- Ni Si -- Silicon Potassium -- K Nitrogen -- N Carbon -- C S -- Sulfur |
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Use an orbital box diagram to explain why oxygen normally can be expected to form 2 bonds in any molecule: |
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[^v] [^v] [^v][^ ][^ ] 1s2 2s2 2p4 Oxygen can be expected to form 2 bonds in any molecule because, as illustrated by the orbital box diagram, there are 2 "vacancies" in the 2 p orbital which O would like to fill with 2e-, thereby resulting in an electron configuration like that of a noble gas. |
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What needs to surround the Lewis Dot structure for PO43-? |
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__ ___ 3- | | | | | | | | |__ __| |