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10 Cards in this Set
- Front
- Back
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Define Electronegativity |
How tightly an atom holds onto electrons |
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Define Primary Bonds |
The sharing of electrons between atoms to satisfy the octet rule. |
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What is the order of strength of primary bonds, highest to weakest. |
Ionic Bonds > Covalent Bonds > Metallic Bonds |
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What's the strongest nonbonding interaction? |
Hydrogen bond |
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What is a permanent dipole? |
When a very electronegative atom forms a covalent bond with a less En atom. |
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The strongest interactions between water molecules are their___________ |
Hydrogen Bonds |
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The strongest interactions between methane molecules are their ______________ |
Induced dipole interactions |
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The water remains a liquid because its interactions are ____________ |
Stronger |
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CdLi and SiC have approximately the same ΔEN, but one is a good conductor of electricity and one is not. Identify which compound is a good conductor of electricity, and explain why ΔEN is not sufficient to distinguish between them. |
SiC has covalent bonding while CdLi has metallic bonding. CdLi would be the good conductor because in metallic bonding the electrons are not associated with a single atom and are free to move. In covalent bonding the electrons are localized in the bond between the two atoms and are not free to move. |
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Explain why hydrogen fluoride (HF) has a higher boiling point than hydrogen chloride (HCl) (19.4 ∘C versus -85 ∘C), even though HF has a lower molecular weight. |
HF has a higher boiling point than HCl, because even though HF and HCl are both Covalent bonds and HF has a lower weight; the EN difference between Hydrogen and Flourine is significantly greater than Hydrogen and Chlorine's. The HF molecule's greater EN difference causes for a stronger bond, in which the stronger bond results in a higher boiling point for the bonds to break. |
