Elements, Mixtures, Compounds

Facts:

1. Chemical Combined - Sodium + Chlorine = Sodium Chloride
2. Elements: Metals & Non - Metals (pg 61 TB)
3. Ion - an atom or molecule which has gained or lost one or more of its electrons, giving it a net positive or negative charge.  
4. Atom - defining structure of anelement, which cannot be broken by any chemical means. A typical atom consists of a nucleus of protons & neutrons with electrons orbiting this nucleus. 
5. Definitions of :
   Molecule - a molecule refers to 2 or more atoms which have chemically combined to form a single species.

1. Monoaomic - Helium, Argon, Krpton
2. Diatomic - O2 , H2
3. Triatomic - O3
4. Polyatomic - S8

Questions:

1. Is rusting of iron a chemical change?

Response:

1. Paper + Fire = Ash
2. Iron + Oxygen = Rust