1. DO NOW! (On the back of the blank atom model. Write the ? And answer  If an atom has five protons and four electrons, the atom is a. neutral b. radioactive c. negatively charged d. positively charged

2. DO NOW! (On the back of the blank atom model. Write the ? And your answer In Rutherford’s experiment, what caused some high-energy particles to bounce off the metal, while most pass straight through? A. Light waves B. Magnetic waves C. Positive charges D. Negative charges

3. Elements, Compounds, and Molecules

4. Atom

8. A=P=E M-P=N OR (M=P+N) (A=P=E) Atomic # = #protons = #electrons (M-P=N) Mass# - #Protons = #Neutrons OR (M=P+N) Mass# = #Protons + #Neutrons A=P=E M-P=N OR (M=P+N) (A=P=E) Atomic # = #protons = #electrons (M-P=N) Mass# - #Protons = #Neutrons OR (M=P+N) Mass# = #Protons + #Neutrons FORMULA FOR DECODING ATOMIC INFORMATION?:

12. Your turn!  Using the strategies on the last slides, use the blank atom model to fill in an atom that has 11 Protons, 12 neutrons, and 11 electrons.  Using the periodic table, what is the name of the element you just labeled?  Hint- Atomic #= # of protons= # of electron

23. Molecules  Molecule- A molecule is formed when two or more atoms are chemically bonded together. All compounds are molecules but not all molecules are compounds. EXAMPLES: H 2 O 2 H 2 O H 2 C 60 Compound & Molecule Compound & Molecule Molecule Molecule