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CHEMISTRY. ATOMS
Let’s make a booklet.
Agenda 11.28
Bell ringer
 New booklet
construction
 New notes.
 Q.A for tickets

Bell ringer: Look
around the room
and describe 3
or 4 things that
are not made of
metals.
 4 sentences.

Wednesday, November 28, 2012


7-5.1 Recognize that matter is composed of
extremely small particles, too small to be seen with
a classroom microscope, called atoms
7-5.2
Classify matter as element, compound, or
mixture on the basis of its composition.
7-5.3
Compare the physical properties of
metals and nonmetals.
Chemistry basics



1. Matter is composed of extremely small
particles, too small to be seen with a classroom
microscope, called atoms.
2. Atoms are the smallest part of an element that
has the chemical properties of the element.
3. A single atom has mass and takes up space.
4. Pure substances are elements and
compounds.

5. Elements
 Elements
are pure
substances that cannot
be changed into
simpler substances.
 Elements are composed
of one type of atom.

6. Compounds
 Compounds
are pure
substances that are
composed of two or more
types of elements that are
chemically combined.
 Compounds can only be
changed into simpler
substances called
elements by chemical
changes
 7. One way that two or
more atoms can combine
is to form a molecule.
8. Mixtures
 Mixtures
are composed of two or more
different substances that retain their own
individual properties and are combined
physically (mixed together).
 Mixtures can be separated by physical
means (filtration, sifting, or evaporation).
 Mixtures may be heterogeneous or
homogeneous.
10. In a homogenous
mixture, which is
uniform throughout, the
substances are evenly
mixed and cannot be
visibly distinguished.
The particles of the
substances are so small
that they cannot be
easily seen.
11. Another name for a
homogeneous mixture
is a solution.


9.
In a
heterogeneous
mixture, which is not
uniform throughout,
the parts can be
visibly
distinguished.
Periodic Table

12. There is a zigzag line on the right side of the table
of the periodic table . There are two sections of
elements on the periodic table, metals and nonmetals.
13. Metals
 A major classification of
elements generally
located on the left side
of the zigzag line on
the periodic table.
 Examples of metals
are: Sodium (Na),
Calcium (Ca), Iron (Fe),
and Aluminum (Al).
The majority of elements
are metals.

14. Nonmetals
A major classification
of elements generally
located on the right
side of the zigzag
line on the periodic
table.
 Examples of
nonmetals are:
Chlorine (Cl),
Oxygen (O), Sulfur
(S), and Iodine (I).

11.29.12


7-5.3
Compare
the physical
properties of
metals and
nonmetals.


Bell ringer: Describe
three metal objects
without naming them.
Homework collection
Notes
15. Characteristics of metals





A. Luster - Having a shiny surface or reflecting
light brightly
B. Conductors - Heat and electricity move through
them easily
C. Malleable - Ability to be hammered into
different shapes
D. Ductile - Ability to be drawn into a wire
E. High density - Heavy for their size
Luster - Having a shiny
surface or reflecting light
brightly
Conductors - Heat and
electricity move through
them easily
Ductile - Ability to be drawn
into a wire
High density – means Heavy
for their size
Malleable - Ability to be
hammered into different
shapes
16. Physical properties of nonmetals
include:



A. Dull - Not shiny
B. Nonconductors Heat and electricity
do not move through
them easily,
(insulator)
C. Brittle - Break or
shatter easily (solids)
Dull—
No shine
Brittle—
breakable
Non conductor-insulator
Chemical Symbols


17. Elements are made up of
one kind of atom and has a
unique symbol.
18. Symbols are usually a 1 or 2
letters that stand for the name of the
substance. The first letter is always
capitalized and the second, if there is
one, is lower case.
Common Chemical
Symbols
Element
Symbol
Sodium
Na
Chlorine
Cl
Hydrogen
H
Oxygen
O
Carbon
C
Nitrogen
N
19. Formulas and names of substances

(,,,, and) and the names and symbols for the elements
listed in the elements Sodium (Na), Chlorine (Cl),
Hydrogen (H), Oxygen (O), Carbon (C), and Nitrogen
(N). For
example,
students see the formula H2O,
Common
names when
formulas
they should
table salt be able to recognize that this is water.
simple sugar

oxygen gas
Compounds are composed of more than one element
carbon dioxide
and their
formulas have more than one type of symbol
nitrogen gas
showing the different elements that compose the
compound.