Aqa Certificate in Chemistry (Igcse) Level 1/2: Chemistry (Chapter 3)- Structure And Bonding Flashcards
What are ionic compounds
Ionic compounds are compounds held together by strong forces due to oppositely charged ions
Why do ionic compounds have such a high boiling point?
-Due to strong oppositely charged ions, it takes a lot of energy to break these bonds
Why can ionic compounds conduct electricity when dissolved in water or is in a molten state?
Because as the bonds have broken, the ions can freely move around carrying charge with them through the liquid
What is covalent bonding?
When atoms of non metals share a pair of electrons
Why do simple molecules have low boiling points and melting points?
Because they have weak intermolecular forces, allowing them to be broken apart easily
Why are simple molecules unable to conduct electricity?
Because they have no overall charge.
What are the properties of giant covalent structure?
-High melting/boiling points
-Insoluble in water
What are the properties of graphite?
-Can conduct electricity (due to delocalized electrons)
-Soft and slippery (No covalent bonds between layers)
What is fullerness
Hexagon rings of carbon
What is nano science?
The science of studying extremely small particles
What makes nanoparticles good catalysts
Large surface area to volume ratio