3.1.3 bonding Flashcards
1
Q
ionic bonding
A
oppositely charged ions held together by electrostatic attractions
2
Q
ionic bonding - electric conductor
A
only when molten or dissolved in a solution as the ions are free to move around
3
Q
ionic bonding- high melting points
A
- many strong electrostatic forces between oppositely charged ions
- lots of energy is needed to overcome these forces
4
Q
giant ionic lattice
A
- regular structure
- cubic shape
- giant repeating patterns
eg : sodium chloride
5
Q
ionic bonding solubility
A
water molecules are polar so they can attract the positive and negative ions to break up the structure
6
Q
graphite
A
- each carbon bonded 3x with 4th e- delocalised
- high melting point: lots of strong covalent bonds
- slides easily: weak forces between layers
- carries charge: delocalised e- allow conduction of electricity
- low density: layers are far apart
- insoluble: bonds are too strong to dissolve
7
Q
dative covalent bonding
A
- where 1 atom donates 2 e- to an atom or ion to form a bond
- represented with an arrow
8
Q
diamond
A
- each carbon bonded 4c in a tetrahedral shape
- conducts heat: tightly packed, rigid arrangement
- high melting point: many strong covalent bonds
- doesn’t conduct electricity: doesn’t have any delocalised e-
- can be cut into gemstones
9
Q
covalent bonding
A
- sharing of e- to obtain full outer shell
- electrostatic attraction between shared e- and positive nucleus
- single, double, triple covalent bonds because more e- are shared
