2. CH 4 SEC 1 INTRODUCTION TO ATOMS

3. ATOM ATOM- IS THE SMALLEST PARTICLE OF AN ELEMENT. KEY- YOU CANT SEE AN ATOM. KEY- THE ATOMIC THEORY GREW AS A SERIES OF MODELS THAT DEVELOPED FROM EXPERIMENTAL EVIDENCE. KEY- AS MORE EVIDENCE WAS COLLECTED, THE THEORY AND MODELS WERE REVISED

4. COPY FIG 2 DALTONS IDEAS ELECTRONS- ARE NEGATIVELY CHARGED PARTICLES THAT SURROUND THE NUCLEUS ELECTRONS- ARE NEGATIVELY CHARGED PARTICLES THAT SURROUND THE NUCLEUS NUCLEUS- CENTER OF THE ATOM CONSISTING OF PROTONS AND NEUTRONS NUCLEUS- CENTER OF THE ATOM CONSISTING OF PROTONS AND NEUTRONS PROTONS- POSITIVELY CHARGED PARTICLES IN THE NUCLEUS PROTONS- POSITIVELY CHARGED PARTICLES IN THE NUCLEUS NEUTRONS- ARE NO CHARGE BUT SIMILAR MASS TO PROTON. Located in the nucleus. NEUTRONS- ARE NO CHARGE BUT SIMILAR MASS TO PROTON. Located in the nucleus.

5. COPY FIG 7 THE MODERN MODEL OF AN ATOM KEY- AT THE CENTER OF THE ATOM IS A TINY, MASSIVE NUCLEUS CONTAINING PROTONS AND NEUTRONS. KEY- AT THE CENTER OF THE ATOM IS A TINY, MASSIVE NUCLEUS CONTAINING PROTONS AND NEUTRONS. KEY- SURROUNDING THE NUCLEUS IS A CLOUDLIKE REGION OF MOVING ELECTRONS. Also called the ‘electron cloud’… KEY- SURROUNDING THE NUCLEUS IS A CLOUDLIKE REGION OF MOVING ELECTRONS. Also called the ‘electron cloud’…

6. Electrons surround the nucleus of protons and neutrons

7. Another model of an atom

8. COPY FIG 8 in your notes KEY- ATOMS ARE AMAZINGLY SMALL. THE TINIEST SPECK OF DUST MAY CONTAIN 10MILLION BILLION ATOMS! KEY- ATOMS ARE AMAZINGLY SMALL. THE TINIEST SPECK OF DUST MAY CONTAIN 10MILLION BILLION ATOMS! ATOMIC NUMBER- THE NUMBER OF PROTONS IN THE NUCLEUS OF AN ATOM. ATOMIC NUMBER- THE NUMBER OF PROTONS IN THE NUCLEUS OF AN ATOM. KEY- EVERY ELEMENT HAS A DIFFERENT NUMBER OF PROTONS. The number tells us how many protons are in the element KEY- EVERY ELEMENT HAS A DIFFERENT NUMBER OF PROTONS. The number tells us how many protons are in the element EX- CARBON ATOMIC# IS 6 HOW MANY PROTONS? OXYGEN ATOMIC# IS 8- PROTONS? IRON AT #26- PROTONS? EX- CARBON ATOMIC# IS 6 HOW MANY PROTONS? OXYGEN ATOMIC# IS 8- PROTONS? IRON AT #26- PROTONS?

9. Check these sites for more on the periodic table http://periodictable.com/ http://periodictable.com/ http://periodictable.com/ http://www.chemicalelements.com/ http://www.chemicalelements.com/ http://www.chemicalelements.com/ http://science.howstuffworks.com/periodic- table-videos-playlist.htm http://science.howstuffworks.com/periodic- table-videos-playlist.htm http://science.howstuffworks.com/periodic- table-videos-playlist.htm http://science.howstuffworks.com/periodic- table-videos-playlist.htm

11. ANSWER QUESTIONS from text ch4 sec 1 1-A 1-A 2A,B,C 2A,B,C http://www.brainpop.com/science/matteran dchemistry/atoms/ http://www.brainpop.com/science/matteran dchemistry/atoms/ http://www.brainpop.com/science/matteran dchemistry/atoms/ http://www.brainpop.com/science/matteran dchemistry/atoms/