C3 Flashcards
(13 cards)
What is Ionic bonding
Bonding that involves an attraction between oppositely charged ions. They are found in compound made of metals and non-metals
What is covalent bonding
Bonding that involves 2 atoms sharing 1 or more pairs of electrons. In compounds of non metals
What is metallic bonding
Bonding that involves an attraction between positively charged ions and negatively charged delocalised electrons. Occurs in compounds of metals
What are ions
Charged particles and they are created when an atom or molecule gains or loses electrons.
What giant structures do ionic compounds form?
Ionic lattices that are held together by strong electrostatic forces
Example of a giant covalent structure
Diamond
What are delocalised electrons
Electrons that are not bound to an atom and are free to move around within the lattice. It happens because metal agoms have a small number of electrons in the outer shell
Properties of solids
Fixed shape and volume
Particles vibrate about a fixed point
Particles are close together
What are the disadvantages of the simple sphere model
- Forces between particles aren’t shown
- Portrays particles as spherical
- portrays particles as solids
Properties of a liquid
Fixed volume
Particles flow randomly past one another
Particles are close together
Variable shape
What is freezing
When a liquid is cooled to its melting point and becomes a solid
What is condensing
When a gas is cooled down to its boiling point, it condenses and becomes a liquid
What is boiling
When a liquid is heated to its boiling point, it evaporates and becomes a gas
