MasteringChemistry: HW9-Chapter9 - Google Chrome a https://session.masteringchem
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MasteringChemistry: HW9-Chapter9 - Google Chrome a https://session.masteringchemistry.com/myct/itemView?assignmentProblemID-41340180 UBCHE101SPRING2015 HW9-Chapter PhET Simulation - Molecule Polarity - Custom Signed in as Chengyao Zheng HelpClose Resources previous | 11 of 25 | next » When the simulation is opened you should see two atoms (A and B) with a dipole moment drawn directly over the bond. As the electronegativity for each atom is adjusted using the sliders above, the dipole moment arrow will grow, shrink, or change directions. There are check boxes to the right of the molecule to control whether bond dipoles, bond character, or partial charges are displayed. There are also radio buttons to control the display of electrostatic potential, the display of electron density, and the ability to enable an electric field. Clicking the Three Atoms tab brings up a similar display but with an additional atom. Clicking the Real Molecules tab enables you to view the properties of various real compounds Part A In the PhET simulation window, click the Two Atoms menu in the top left comer of the screen. Click on the partial charges check box to see the partial charges of the atoms. Vary the electronegativity of atom A and atom B and observe the effects on the partial charge of each accordingly Use the PhET to Match the words to the appropriate blanks in the sentences below. Make certain each sentence is complete before submitting your answer e the sentences desc how is related to bond ex ed by the molecule 1. When two atoms with different electronegativities are bonded together, a bond covalent exists. These are displayed with an arrow originating at the atom with the lowest electronegativity and pointing toward the atom with the highest electronegativity 2. Partial charges will exist on each atom when a bond exists between two atoms with different electronegativities. Since the ionic atom with a higher electronegativity will have a stronger ability to attract electrons, it will have a partial negative charge The atom with a lower electronegativity will have an equal and opposite positive charge. As the difference in electronegativity increases, the resulting magnitudes of the partial charges will decrease . increase 3. Bond character is used to describe the severity of the electronegativity differences between the two atoms involved in a bond Bonds that have less character correspond to a larger difference in electronegativities, and more bond character corresponds to a smaller difference 4. For example, increasing the electronegativity of atom "A in the PhET simulation and decreasing the electronegativity of atom "B" will result in a bond that is dipole ionic in character reset help Submit Hints My Answers Give Up Review Part Incorrect, One attempt remaining, Iry Again You filled in 5 of 9 blanks incorrectly. What term is used to describe the existence of partial charges across a bond owing to electronegativity differences and the resulting unequal sharing of electrons? Bond polarity Bond polarity results from two bonded atoms having differing electronegativity values. Covalent bonds exist when the two atoms involved in the bond share the electrons. These electrons are shared either evenly or unevenly to a degree depending on the electronegativity differences between the two atoms. Ionic bonds exist when the two atoms transfer electrons. These electrons are so strongly attracted to the more electronegative atom that there is virtually no sharing of electrons and the atoms are simply attracted to another by having opposite charges The difference in electronegativity values can be used to predict the type of bond formed between two atoms @Symantec En...- 6:23 2015/5/1 e chegg Study I MasteringChe - @ w Study .MasteringChe... 14°CExplanation / Answer
You have made mistake in filling 1st, 6th, 7th, 8th and 9th blank space. Let's fill them correctly.
1. When two atoms with different electronegativities are bonded together, a bond (dipole) exists.
2, 3, 4 and 5 are correct.
6. As the difference in electronegativity increases, the resulting magnitude of partial charge will (increase).
7. Bonds that have ionic character corresponds to a large difference in electronegativities
8. and (covalent) bond charcter corresponds to a smaller difference.
9. In 9th option, since i am unable to see the figure, the answer will be more or less. If A is more electrnegative than B, then increasing the electronegativity of atom A and decreasing the electronegativity of atom A will result (more) ionic character. I think this would be the situation.
If A is less electrnegative than B, then increasing the electronegativity of atom A and decreasing the electronegativity of atom A will result (less) ionic character.