diff --git a/Grade 9/Science/SNC1DZ/Unit_2_Chemistry_Study_Sheet.md b/Grade 9/Science/SNC1DZ/Unit_2_Chemistry_Study_Sheet.md
index 560b0bd..55f331a 100644
--- a/Grade 9/Science/SNC1DZ/Unit_2_Chemistry_Study_Sheet.md
+++ b/Grade 9/Science/SNC1DZ/Unit_2_Chemistry_Study_Sheet.md
@@ -97,7 +97,7 @@
| Physical Change |
-A change in which the composition of the substance remains unaltered` and `no new substances are produced |
+A change in which the composition of the substance remains unaltered and no new substances are produced |
| Chemical Change |
@@ -138,6 +138,14 @@
Valence Electrons |
Number of electrons on the most outer orbit/shell of the element |
+
+| Element |
+A single particle that is on the periodic table, currently, we have 118 elements discovered |
+
+
+| Compound |
+A bunch of elements, or a compound of elements, a particle that is made of many different elements |
+
## Particle Theory of Matter
@@ -191,7 +199,7 @@
-## Quantitative physical Properties
+## Quantitative Physical Properties
- **```Density```**: amount of ```stuff``` (or mass) per unit volume (g/cm3)
- **```Freezing Point```**: point where water solidifies (0oC)
- **```Melting Point```**: point where water liquefies (0oC)
@@ -212,7 +220,7 @@
|Form: Crystalline Solid|Have their particles arranged in an orderly geometric pattern|Salt and Diamonods|
|Form: Amorphous Solid|Have their particles randomly distributed without any long-range-pattern|Plastic, Glass, Charcoal|
-# Chemical Property
+## Chemical Property
- A characteristic (property) of a substance that describes its ability to undergo ```changes to its composition to produce one of more new substances. AKA BEHAVIOUR. Everything has one!```
- ```Cannot be determined by physical properties```
@@ -224,6 +232,9 @@
- CLR used to clean kettles, showerheads because it breaks down minerals
- Silver cleaner for tarnished jewellery, dishes because silver reacts with air to turn black.
+## Five Aspects Of Chemical Change
+
+
## Periodic Table
