Ionic Compound Flashcards
1
Q
Valence Electrons & Stability
A
- Full Valence energy level= stable
- Atoms can gain a full valance set by losing or gaining electrons
- This makes atom an ion
2
Q
Ions & The Periodic Table
A
- Metals are positive ions (cation)
- Non metals are negative ions (anion)
- Positive ions/metals don’t change their name (-ide)
3
Q
Lewis Diagrams for Ions
A
- Shows element, charge and valence electrons
- Ionic bond= attraction of positive and negative
- Positive and negative beside each other
4
Q
Structure of Ionic Compounds
A
- Crystal Lattice= Repeating formulas in ionic compound
- 1 unit of ionic compound is a formula unit
5
Q
State at room temperature
A
Solid
Electrostatic forces are strong keeping ion solid
6
Q
Melting/Boiling point
A
- High melting point
- Held by electrostatic forces, allowing high melting point
- Electrostatic force= bond between positive and negative (formula unit)
7
Q
Physical properties
A
- Hard
- Strong force of attraction keeps it in solid form= making it hard
- Brittle
- If you apply external force, it causes shift in layers so hard that same charges align
- When like charges on on top of eachother, it’s going to cause repulsion and breakage
8
Q
Solubility in water
A
- If crystal is placed in water, water will surround each ion and will start to speater
- O atoms are slightly negative so they join with sodium
- H atoms are slightly positive so they join with chlorine
- Opposite forces attract
- Water molecules pulls elements away from solid
- It will slowly break away and become aquous (mixed with water)
9
Q
Electrical conductivity as a solid
A
None
Need to dissolve in water and move freely to conduct electricity
10
Q
Electrical conductivity when dissolved in water
A
- When dissolved, ionic compounds can conduct electricity
- This creates electrolyte
- Dissolved ion scan move more freely, and carry charges in the water
11
Q
A
