Download 10/3/16 Intro Atomic Theories

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Transcript
QQ:
1. Atom B has a mass of 42 and an
atomic number of 20. How many protons,
electrons, and neutrons does it have?
2. Atom K has 15 electrons and 10
neutrons. What is its atomic number and
atomic mass?
3. An atom with 64 protons has an
atomic mass of 64. What is its atomic
number? How many electrons and
neutrons does it have?
Today’s Objective:
I understand the
development of current
atomic theory.
Vocabulary Quiz
Is it possible to figure out what
this is without unwrapping it?
Follow instructions carefully.
Do not remove any papers
or look underneath
Figure out the phrase.
Write down a guess.
Remove the top sheet.
Write down your new
prediction.
How did the
information on the
sheets change as
you moved through
the stack?
How did the number
of letters provided
affect your ability
to predict the
phrase?
Describe another situation
in which having more data
makes it easier to make a
prediction.
Democritus 400 BC
Unable to be divided
Aristotle 400 BC
•
•
•
•
4 basic elements
Air
Earth
Fire
Water
Dalton 1776
Dalton 1803
 Same mass
 Can make compounds
Thomson 1897
Subatomic
particles: electron
Thomson:
Plum
Pudding
Rutherford 1911
Nucleus has + charge
Rutherford:
Gold Foil Experiment
Nucleus is Positive
Most is
Atom
particles
mostly
traveled
empty
through
space.
the foil.
Some is
Nucleus
particles
positively
were
charged.
Nucleus
Occasionally reflected
carries
bounced
back.
most
back. of
atom’s
mass.
Bohr 1913
More energy in levels
Farther away from
nucleus
Electron
Configurations:
Arrangements of
electrons around the
nucleus based
on their
energy
Level.
Electron Cloud Theory
Schrodinger 1926
Cloud shows areas
where electrons
are likely to be
found.
Schrodinger's Cat
A Weird and
Wondrous
Place
Q2: Work on your news article.
Remember:
• Newspaper format
• Scientist & His Discovery
• Year of Discovery
• Previous Theories
• Picture
• Quality of Product
Draw and complete the table.
Draw and complete the table.
7
5
9
19
5
18
18
29
7
19
18
6