1. Lecture 4.2: Combining Atoms

2. Atoms (review) Smallest unit of matter Can not be divided
Contain protons, neutrons, and electrons H

3. Element
A pure substance consisting of only one particular type of atom
Determined by the number of PROTONS in the nucleus (atomic #)
Can not be broken down into another substance O H

4. Molecule Two or more ATOMS combined
Can be two or more of the SAME element or DIFFERENT elements H O H H

5. Compound Special type of molecule
Two or more atoms of DIFFERENT ELEMENTS combined H O H H

6.  #1 #4 #2 #3 #5 #7 #6