CH 4 SEC 1 INTRODUCTION TO ATOMS GOAL/PURPOSE WE HAVE LEARNED THAT THE UNIVERSE IS HUGE AND EXPANDING. WE HAVE LEARNED THAT THE UNIVERSE IS HUGE AND.

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Presentation transcript:

CH 4 SEC 1 INTRODUCTION TO ATOMS

GOAL/PURPOSE WE HAVE LEARNED THAT THE UNIVERSE IS HUGE AND EXPANDING. WE HAVE LEARNED THAT THE UNIVERSE IS HUGE AND EXPANDING. NOW WE WILL FOCUS ON WHAT IT IS MADE OF AND HOW MATTER, MATTERS….. NOW WE WILL FOCUS ON WHAT IT IS MADE OF AND HOW MATTER, MATTERS…..

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

COPY FIG 2 DALTONS IDEAS p.125 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 Neutron's- ARE NO CHARGE particles BUT SIMILAR MASS TO PROTON. Located in the nucleus. Neutron's- ARE NO CHARGE particles BUT SIMILAR MASS TO PROTON. Located in the nucleus.

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’…

Electrons surround the nucleus of protons and neutrons

Another model of an atom

COPY FIG 8 p.129 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?

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ANSWER QUESTIONS from text ch4 sec 1 p A,B,C 1-A,B,C 2-A,B,C 2-A,B,C dchemistry/atoms/ dchemistry/atoms/ dchemistry/atoms/ dchemistry/atoms/