look at what we've learned
by: Ashleigh Bounds , Grace Phillips
Elements
Silicon Si
Oxygen O and Hydrogen H
atom- Single unit of matter.
Compounds
Element- A Pure Substance, On The Periodic Table, Written With Symbols.
Compound- A New Substance, Has Molecules, 2 Or More Elements, Chemical Change, Written As Formula.
One Example Of A Compound Is: H.2.0 And H.2.0 Is A Compound That Makes Up Water.
Molecule- Combination Of Atoms To Form A Compound.
Chemical Formula
H2SN4OFeAr6 6 elements in the formula
15 atoms in this formula
H = Hydrogen 2 atoms
S = Sulfer 1 atom
N = Nitrogen 4 atoms
O = Oxygen 1 atom
Fe = Iron 1 atom
Ar = Argon 6 atoms
Chemical Changes
The 4 Main Chemical Changes:
- Color
- Gas
- Liquid
- Temperature
How To Identify One Of The Changes Take Place:
Color- You See It Change From It Original Color To A Different Color.
Gas- You Can See And Look At The Object And See If It Is Evaporating.
Liquid- You Can See If Your Object Is Melting.
Temperature- You Can Stick A Themometer In The Object And See If The Temperature Rises Or Decreases.
What Happened When To The Two Substances When A Chemical Change Takes Place?
Lets Use Hydrogen And Oxygen. If You Put Them Together You Form A New Substance/ Chemical Change, And Hydrogen And Oxygen Will Make Water.