Questions | Answer | Links | Explanations |
| 11 Which phrase describes the distribution of charge and polarity in a CH4 molecule? (1) symmetrical and polar (2) symmetrical and nonpolar (3) asymmetrical and polar (4)asymmetrical and nonpolar | 2 | link | SNAP symmetrical nonpolar asymmetrical polar |
| 12 What is the charge of the nucleus of an oxygen atom? (1) 0 (2) -2 (3) +8 (4) +16 | 3 | link | oxygen has 8 protons in the nuclues |
| 13 Which has no electrons? (1) H+ (2) Li+ (3) Na+ (4) Rb+ | 1 | link | a hydrogen atom has 1 protons and 1 electron, but H+ has lost that electron |
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| 14 To break a chemical bond, energy must be (1) absorbed (2) destroyed (3) produced (4) released | 1 | link | breaking bonds absorbs energy |
| 15 Which Lewis electron-dot diagram represents a nitrogen atom in the ground state? 
| 3 | link | 2-5 nitrogen will have 5 dots |
| 16 What is the most likely electronegativity value for a metallic element? (1) 1.3 (2) 2.7 (3) 3.4 (4) 4.0 | 1 | link | Table S, pick a random metal and it will have a low electronegativity value |
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| 17 Which polyatomic ion has a charge of 3-? (1) chromate ion (2) oxalate ion (3) phosphate ion (4) thiocyanate ion | 3 | link | Table E |
| 18 Every chlorine atom has (1) 7 electrons (2) 17 neutrons (3) a mass number of 35 (4) an atomic number of 17 | 4 | link | all atoms of Cl have an atomic number of 17 |
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| 19 Which substance can not be broken down by a chemical change? (1) ammonia (2) methanol (3) propane (4) phosphorous | 4 | link | pick the element |
| 20 At standard pressure, which substance becomes less soluble in water as temperature increases from 10.oC to 80.OC? (1) HCl (2) KCl (3)NaCl (4)NH4Cl | 1 | link | Use Table G, HCl is a gas and slopes down |