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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.

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Presentation on theme: "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."— Presentation transcript:

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

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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?:

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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

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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

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