Aqa Certificate in Chemistry (Igcse) Level 1/2: Chemistry (Chapter 3)- Structure And Bonding Flashcards


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1

What are ionic compounds

Ionic compounds are compounds held together by strong forces due to oppositely charged ions

2

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

3

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

4

What is covalent bonding?

When atoms of non metals share a pair of electrons

5

Why do simple molecules have low boiling points and melting points?

Because they have weak intermolecular forces, allowing them to be broken apart easily

6

Why are simple molecules unable to conduct electricity?

Because they have no overall charge.

7

What are the properties of giant covalent structure?

-High melting/boiling points
-Insoluble in water

8

What are the properties of graphite?

-Can conduct electricity (due to delocalized electrons)
-Soft and slippery (No covalent bonds between layers)

9

What is fullerness

Hexagon rings of carbon

10

What is nano science?

The science of studying extremely small particles

11

What makes nanoparticles good catalysts

Large surface area to volume ratio