ATOMIC CONCEPT ATOMIC THEORY MODEL

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Presentation transcript:

ATOMIC CONCEPT ATOMIC THEORY MODEL CHEMISTRY OCTOBER 16, 2014 ATOMIC CONCEPT ATOMIC THEORY MODEL

You are seated and quiet You have 2 minutes SCIENCE STARTER You are seated and quiet You have 2 minutes Draw your version of the atom in the box

NO QUIZ TOMORROW!

AIM What is the size of an atom if the nucleus is the size of a basketball?

VOCABULARY ATOM NUCLEUS ELECTRON CLOUD ELECTRONS

ATOM the basic units of matter and the defining structure of elements. It is composed of a nucleus and electron clouds

the positively charged center of an atom NUCLEUS the positively charged center of an atom

ELECTRON CLOUD the region of negative charge surrounding an atomic nucleus that is associated with an atomic orbital.

the negatively charged component of an atom. ELECTRON the negatively charged component of an atom.

How does the electron move around the nucleus? MOVEMENT IN ATOMS How does the electron move around the nucleus?

DEMONSTRATION

MOVEMENT IN ATOM (ANSWER) The electrons moved in an indefinite paths (buzzing around the nucleus like a swarms of bees)

Why do the electrons not drift off? ATTRACTION Why do the electrons not drift off?

ATTRACTION (ANSWER) The electrons are negatively charged particles that are attracted to the positively charged nucleus

SIZE OF NUCLUES What is the size of a nucleus compared to an atom?

SIZE OF NUCLEUS (ANSWER) Atom is about 10-10 meters Nucleus is about 1 – 10 x 10-15 meters

WHAT IS ATOM MOSTLY MADE UP OF? Empty space

COMPARING NUCLEUS TO ATOM How much bigger is an atom to a nucleus

COMPARING NUCLUES TO ATOM The nucleus is about 23000 – 145,000 times smaller than an atom depending upon the element Uranium – 23,000 times Hydrogen – 145,000 times

BASEBALL COMPARISON Example: if the nucleus was a baseball, what is the size of the atom? What is the size of the electron?

the atom will be about 4km BASEBALL COMPARISON the atom will be about 4km the electron will be about the size of a period.

Tear a piece of paper 12 times. Now tear it again 30 times. TRY THIS Tear a piece of paper 12 times. Now tear it again 30 times.

BASKETBALL COMPARISON How big is the atom if the nucleus is the size of a basketball?

THE ATOMIC THEORY MODEL Also known as the Wave-Mechanical Model