C2.2 Flashcards
1
Q
What are physical properties of metals?
A
Properties of metals:
- High melting/boiling point
- Malleable (shatter without bending)
- Ductile (pulled into wired)
- Good conductors
2
Q
What are physical properties of non-metals
A
Properties of non-metals:
- Low melting and boiling point
- Half are solid, half are gas
- Shatter when hammered
- Non-ductile (snap when pulled)
- Insulators
3
Q
How do shells work?
A
Shells:
- 1st period (row) has 1 shell
- 1st shell can hold upto two electrons
- 2nd shell can hold upto eight electrons
4
Q
What are ions?
A
Ions:
- Charged particles formed when atom loses or gains electrons
5
Q
How do metals form ions?
A
Metal ions:
- Lose electrons to form positive ions
6
Q
How do non metals form ions?
A
Non metals:
- Gain electrons to form negative ions
7
Q
What is a covalent bond?
A
Covalent bond:
- Shared pair of electrons
- Non metal
8
Q
What is a giant covalent structure?
A
Giant covalent structure:
- Made up of many non-metal atoms joined together
- Arranged in lattice (regular repeating pattern)
9
Q
What is a diamond?
A
Diamond:
- Each carbon atom forms 4 bonds with each other
10
Q
What is silicon dioxide?
A
Silicon dioxide:
- Each silicon atom forms 4 bonds with oxygen atoms
11
Q
What are polymers?
A
Polymers:
- Smaller monomers joined together
- Each momomer joined together by a covalent bond
12
Q
What are thermosoftening polymers?
A
Thermosoftening polymers:
- Weak intermolecular forces
- Can slide past each other
- Soft
13
Q
What are thermosetting polymers?
A
Thermosetting polymers:
- Cross links
- More covalent bonds
- Stronger
14
Q
What are metallic bonds?
A
Metallic bonds:
- Electrostatic attraction between lattice of positive metal ions and delocalised electrons
15
Q
What are delocalised electrons?
A
Delocalised electrons:
- Free to move around
