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Chem Test
Chapter 6 Test
| Question | Answer |
|---|---|
| How does a covalent bond form between two atoms? | shares atams |
| How does a covelent bond differ from an ionic bond? | ionic steals. covalent shares. |
| What is a molecular bond? | space that shares electrons move within |
| Bond ______ is defined as the average distance between two bonded atoms at their minimum potential energy. | length |
| Bond ______ is defined as the energy required to break the chemical bond between two atoms and separate them. | energy |
| The tendency of an atom to attract bonding electrons to itself when it bonds with another atom is called its _________. | electronegitivity |
| A ________ bond is an attraction between two atoms in which bonding electrons are localized on the more electronegative atom. | polar covalent |
| A ________ bond is an attraction between two atoms in which bonding electrons are shared equally between the atoms. | non-polar covalent |
| A ________ molecule is one that has a partial positive charge at one end and a partial negative at the opposite end. | dipole |
| In general, if the difference in electronegativity between two atoms is between 0 and 0.5, that bond formed is ________. | non-polar covalent |
| If the elecronegitivity difference between two atoms is between 0.5 and 2.1, the bond formed is _______. | polar covalent |
| If the electronegativity difference between two atoms is greater than 2.1, the bond formed is _______. | ionic |
| Name the bond (ionic/covalent) in NaF | ionic |
| Name the bond (ionic/covalent) in polyethylene (carbon/hydrogen) | covalent |
| Name the bond (ionic/covalent) between carbon and sulfur | covalent |
| Name the bond (ionic/covalent) between carbon and fluorine | covelent |
| Name the bond (ionic/covalent) between phosphorus and oxygen | covelent |
| An electron in the outermost energy level of an atom that can participate in bonding is called a ________ electron. | valence |
| A structure in which atomic symbols represent nuclei and inner-shell electrons and in which dots are used to represent valence electrons is called a ______ electron. | Lewis |
| A covalent bond in which two atoms share two pairs of electrons is called a _________ bond. | double |
| A covalent bond in which two atoms share three pairs of electrons is called a _______ bond. | triple |
| A covalent bond in which two atoms share one pair of electrons is a ________ bond. | single |
| A non-bonding pair of electrons in the valence shell of an atom is called a _______ pair. | unshared |
| PbCl^2 | Lead (ii) chloride |
| KCl | Potassium chloride |
| LiO^2 | Lithium peroxide |
| PBr^3 | Phosphorus triboride |
| SF^4 | Sodium tetrafloride |
| N^2O^5 | Dinitrogen pentaoxide |
| Nitrogen monoxide | NO |
| Carbon dioxide | CO^2 |
| Carbon tetrachloride | CCl^4 |
| Carbon disulfide | CS^2 |
| What does VSEPR theory predict? | predict shape |
| What is the VSEPR theory? | VALENCE SHELL ELECTRON PAIR REPULSION |
| How does one unbonded pair of electrons (a lone pair) affect the shape of a molecule? | assemetrical |
| How do multiple unbonded pairs of electrons affect the shape of a molecule? | repeal each other (bent) |
| What evidence is there to support the idea that opposite polar ends of molecules attract each other? | it changes properties (magnet w/ water) |
| How do polarity and shape of molecules relate to the properties of a substance? | boiling points differ |
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