6713777
Description
Flashcards by Natalie Woomack, updated more than 1 year ago
|
Created by Natalie Woomack
about 8 years ago
|
|
| Question | Answer |
| Bonding Flashcards: | The end |
| What happens in an exothermic reaction? | Heat is lost |
| Can a covalent network solid be considered be polar or non polar? If so which one? | No. is not polar or non-polar. |
| Is graphite soluble? Why? | No. Because water has strong molecular bonds that won't trade for the weak attractions between C layers of graphite. |
| Explain the structure of graphite... | Made up of layers or sheets of strong carbon atoms. The remaining electrons are intermolecular which means that they are delocalised between those layers of C's. It is a 2D shape. |
| What are the names of the 3 different types of covalent network solids you could be asked about in the exam? | 1) Graphite 2) Diamond 3) Glass (Silicon Dioxide) |
| What are the key words used to describe polarity? | - Shape - symmetrical/a-symetrical - Cancel - Electronegativity - Polar/non-polar bonds - Difference in negativity |
| How many regions of electron density does a tetrahedral shape have and what is the bond angle between each atom? | 4 regions. 109 degrees. |
| How would you make an ionic solid conduct electricity? | - Add heat and melt it. It breaks the electrostatic attraction between cations and anions giving free f;lowing charged particles. - Dissolve in water. Also breaks the attraction between the ions which allows the ions to move freely and conduct electricity. |
| Is an ionic solid conductive? Why | No. If it is a solid it will not conduct. This is because there are no free charged electrons. |
| What are the key words used when describing lewis diagram/structure. | - Region - Electron Density - Central atom - Bonding/ non-bonding - Repulsion |
Want to create your own Flashcards for free with GoConqr? Learn more.