1. Assignment #4 1/28 Warm up 1.-Define The following in your own words:
**Atom
**Molecule
**Compound
2.- Find out the number of Atoms and Elements in the following Chemical formula:
5Zn2(PO2CN4H2Cl)4
3.Which Substance in this reaction is represented as an element?
H20  CO2 + H2

2. Octet Rule
In order for elements to be Happy “Stable”, they need to have their outer shell full with electrons.
Group 18 is stable (non-reactive) because their outer shell is full.

3. Conservation of Matter

4. Mass is neither created nor destroyed during a chemical reaction

5. Mass of Reactants = Mass of Products
Reactants Products
Mass of Reactants = Mass of Products

7. Chemical reactions are represented on paper by
chemical equations.