Section 1 - Principles Of Chemistry Flashcards
0
Q
What kind of Particle Arrangement do liquids contain?
A
- Weak forces of attraction
- Randomly arranged + free to move
- Definite volume, not definite shape
- Constantly moving particles
- Expand slightly when heated
1
Q
What kind of Particle Arrangement do solids contain?
A
- Strong forces of attraction between particles
- Fixed positions
- Regular lattice arrangement
- Don’t move from positions, only vibrate
- Keep a definite volume and shape
- Expand slightly when heated
2
Q
What kind of Particle Arrangement do gases contain?
A
- Very weak forces of attraction
- Particles move and far apart
- Particles travel in straight lines
- Don’t have a definite shape or volume
- Constantly moving particles with random movement
- Expand when heated, or when pressure increases
3
Q
Bright purple substance that shows diffusion in water?
A
Potassium Manganate(VII)
4
Q
Aqueous Ammonia
A
NH3
• Gives off ammonia gas
5
Q
Hydrochloric Acid
A
HCl
• Gives off hydrogen chloride gas
6
Q
Bromine gas
A
- Brown
- Strong odour
- Can be used to demonstrate diffusion in gases
7
Q
The nucleus…
A
- In the middle of atom
- Contains protons and neutrons
- Positive charge due to protons
- Where most of the atom’s mass is
- Tiny compared to the rest of atom
8
Q
Electrons…
A
- Move around the nucleus in energy levels called shells
- Negative charge
- Virtually no mass
- Small, but cover a lot of space
9
Q
The atomic number…
A
Says how many protons there are. It also shows the amount of electrons.
Proton number = Electron number
10
Q
The mass number…
A
Shows how much neutrons and protons there are
11
Q
Name of a diamond’s structure
A
Tetrahedron
12
Q
Uses if Graphite:
A
- Conducting electricity
* Its layers slide over each other, making it a good lubricant
